Run results for: angular.copy vs JSON.parse(JSON.stringify()) vs structuredClone AP3

FIguring out the performance differences between using the operations in the name on copying an array of objects considering the fact that other methods of copying (slice, concat, etc.) are shallow copies and end up being by reference instead of by value.

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

Browser: Chrome 118

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
Object.assign(origArr)	7381064.5 Ops/sec
structuredClone(origArr)	9422.9 Ops/sec
cloneDeep(origArr)	7732.2 Ops/sec

HTML Preparation code:

<html>

<head>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>
</head>

<body>
</body>

</html>
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var origArr = [
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13937,
        startTime: '2023-11-03T00:00:00-04:00',
        endTime: '2023-11-03T00:30:00-04:00',
        duration: 30,
        status: 'PENDING',
        location: '163_FACILITY',
        isTelehealth: false,
        event: {
          name: 'AP Meeting/Admin',
          categoryType: 'Meeting/Admin',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
          {
            resourceId: 18,
            resourceName: 'Jadhav, Vikas V',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 2,
            resourceName: 'Ansari1, Aftab',
            resourceType: 'P',
            isAnchorResource: false,
          },
        ],
        patient: {
          patientGuid: 463400200,
          firstName: 'Sumit',
          middleName: '',
          lastName: 'kale',
        },
        category: {
          type: 'event',
          value: 'Meeting/Admin',
        },
      },
      start: '2023-11-03T04:00:00.000Z',
      end: '2023-11-03T04:30:00.000Z',
      resourceId: 55,
      slotIndex: 314,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 53,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T00:30:00',
        endTime: '2023-11-03T01:30:00',
        duration: 60,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T04:30:00.000Z',
      end: '2023-11-03T05:30:00.000Z',
      resourceId: 55,
      slotIndex: 339,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 47,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 2,
            resourceName: 'Ansari1, Aftab',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T00:45:00',
        endTime: '2023-11-03T01:45:00',
        duration: 60,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T04:45:00.000Z',
      end: '2023-11-03T05:45:00.000Z',
      resourceId: 55,
      slotIndex: 338,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13932,
        startTime: '2023-11-03T02:00:00-04:00',
        endTime: '2023-11-03T03:00:00-04:00',
        duration: 60,
        status: 'PENDING',
        location: '163_FACILITY',
        isTelehealth: false,
        event: {
          name: 'AP Alt Patient Event',
          categoryType: 'Meeting/Admin',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
          {
            resourceId: 18,
            resourceName: 'Jadhav, Vikas V',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 2,
            resourceName: 'Ansari1, Aftab',
            resourceType: 'P',
            isAnchorResource: false,
          },
        ],
        patient: {
          patientGuid: 1078100200,
          firstName: 'JMD Rocks PE',
          middleName: 'JMD Rocks PE',
          lastName: 'JMD Rocks PE',
        },
        category: {
          type: 'event',
          value: 'Meeting/Admin',
        },
      },
      start: '2023-11-03T06:00:00.000Z',
      end: '2023-11-03T07:00:00.000Z',
      resourceId: 55,
      slotIndex: 315,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13933,
        startTime: '2023-11-03T04:00:00-04:00',
        endTime: '2023-11-03T05:00:00-04:00',
        duration: 60,
        status: 'PENDING',
        location: '163_FACILITY',
        isTelehealth: false,
        event: {
          name: 'AP Meeting/Admin',
          categoryType: 'Meeting/Admin',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
          {
            resourceId: 18,
            resourceName: 'Jadhav, Vikas V',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 2,
            resourceName: 'Ansari1, Aftab',
            resourceType: 'P',
            isAnchorResource: false,
          },
        ],
        patient: {
          patientGuid: 1078100200,
          firstName: 'JMD Rocks PE',
          middleName: 'JMD Rocks PE',
          lastName: 'JMD Rocks PE',
        },
        category: {
          type: 'event',
          value: 'Meeting/Admin',
        },
      },
      start: '2023-11-03T08:00:00.000Z',
      end: '2023-11-03T09:00:00.000Z',
      resourceId: 55,
      slotIndex: 316,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 48,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T05:45:00',
        endTime: '2023-11-03T06:15:00',
        duration: 30,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T09:45:00.000Z',
      end: '2023-11-03T10:15:00.000Z',
      resourceId: 55,
      slotIndex: 335,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13941,
        startTime: '2023-11-03T06:15:00-04:00',
        endTime: '2023-11-03T06:40:00-04:00',
        duration: 25,
        status: 'PENDING',
        location: 'GVH-EastWing 1A',
        isTelehealth: false,
        event: {
          name: 'AP Alt Patient Event',
          categoryType: 'Meeting/Admin',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: {
          patientGuid: 1078000200,
          firstName: 'JMD Rocks',
          middleName: 'JMD Rocks',
          lastName: 'JMD Rocks',
        },
        category: {
          type: 'event',
          value: 'Meeting/Admin',
        },
      },
      start: '2023-11-03T10:15:00.000Z',
      end: '2023-11-03T10:40:00.000Z',
      resourceId: 55,
      slotIndex: 317,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 59,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T06:40:00',
        endTime: '2023-11-03T07:00:00',
        duration: 20,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T10:40:00.000Z',
      end: '2023-11-03T11:00:00.000Z',
      resourceId: 55,
      slotIndex: 331,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13934,
        startTime: '2023-11-03T07:00:00-04:00',
        endTime: '2023-11-03T08:00:00-04:00',
        duration: 60,
        status: 'PENDING',
        location: 'GVH-EastWing 1A',
        isTelehealth: false,
        event: {
          name: 'AP Patient Event',
          categoryType: 'Patient Event',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
          {
            resourceId: 18,
            resourceName: 'Jadhav, Vikas V',
            resourceType: 'P',
            isAnchorResource: false,
          },
        ],
        patient: {
          patientGuid: 463400200,
          firstName: 'Sumit',
          middleName: '',
          lastName: 'kale',
        },
        category: {
          type: 'event',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T11:00:00.000Z',
      end: '2023-11-03T12:00:00.000Z',
      resourceId: 55,
      slotIndex: 318,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13947,
        startTime: '2023-11-03T08:00:00-04:00',
        endTime: '2023-11-03T08:20:00-04:00',
        duration: 20,
        status: 'PENDING',
        location: 'Greater Victoria Hospital',
        isTelehealth: false,
        event: {
          name: 'AP Alt Patient Event',
          categoryType: 'Meeting/Admin',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 2,
            resourceName: 'Ansari1, Aftab',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
          {
            resourceId: 18,
            resourceName: 'Jadhav, Vikas V',
            resourceType: 'P',
            isAnchorResource: false,
          },
        ],
        patient: {
          patientGuid: 1078000200,
          firstName: 'JMD Rocks',
          middleName: 'JMD Rocks',
          lastName: 'JMD Rocks',
        },
        category: {
          type: 'event',
          value: 'Meeting/Admin',
        },
      },
      start: '2023-11-03T12:00:00.000Z',
      end: '2023-11-03T12:20:00.000Z',
      resourceId: 55,
      slotIndex: 319,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 65,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T08:20:00',
        endTime: '2023-11-03T09:00:00',
        duration: 40,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T12:20:00.000Z',
      end: '2023-11-03T13:00:00.000Z',
      resourceId: 55,
      slotIndex: 337,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 68,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T09:05:00',
        endTime: '2023-11-03T09:15:00',
        duration: 10,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T13:05:00.000Z',
      end: '2023-11-03T13:15:00.000Z',
      resourceId: 55,
      slotIndex: 328,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 69,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T09:25:00',
        endTime: '2023-11-03T09:50:00',
        duration: 25,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T13:25:00.000Z',
      end: '2023-11-03T13:50:00.000Z',
      resourceId: 55,
      slotIndex: 333,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13935,
        startTime: '2023-11-03T10:15:00-04:00',
        endTime: '2023-11-03T11:15:00-04:00',
        duration: 60,
        status: 'PENDING',
        location: 'GVH-EastWing 1A',
        isTelehealth: false,
        event: {
          name: 'AP Alt Patient Event',
          categoryType: 'Meeting/Admin',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
          {
            resourceId: 2,
            resourceName: 'Ansari1, Aftab',
            resourceType: 'P',
            isAnchorResource: false,
          },
        ],
        patient: {
          patientGuid: 1078100200,
          firstName: 'JMD Rocks PE',
          middleName: 'JMD Rocks PE',
          lastName: 'JMD Rocks PE',
        },
        category: {
          type: 'event',
          value: 'Meeting/Admin',
        },
      },
      start: '2023-11-03T14:15:00.000Z',
      end: '2023-11-03T15:15:00.000Z',
      resourceId: 55,
      slotIndex: 320,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 73,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T11:15:00',
        endTime: '2023-11-03T11:25:00',
        duration: 10,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T15:15:00.000Z',
      end: '2023-11-03T15:25:00.000Z',
      resourceId: 55,
      slotIndex: 329,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 74,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T11:30:00',
        endTime: '2023-11-03T11:50:00',
        duration: 20,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T15:30:00.000Z',
      end: '2023-11-03T15:50:00.000Z',
      resourceId: 55,
      slotIndex: 332,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        freezeNotes: 's',
        freezeReason: 'YN Freeze Reason',
        resourceId: 55,
        startTime: '2023-11-03T11:55:00',
        endTime: '2023-11-03T12:00:00',
        duration: 5,
        sourceType: 'AdHocFreeze',
        category: {
          type: 'AdHocFreeze',
          value: 'Unavailable',
        },
      },
      start: '2023-11-03T15:55:00.000Z',
      end: '2023-11-03T16:00:00.000Z',
      resourceId: 55,
      slotIndex: 341,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 75,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 18,
            resourceName: 'Jadhav, Vikas V',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T12:00:00',
        endTime: '2023-11-03T12:25:00',
        duration: 25,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T16:00:00.000Z',
      end: '2023-11-03T16:25:00.000Z',
      resourceId: 55,
      slotIndex: 334,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 76,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T12:30:00',
        endTime: '2023-11-03T12:40:00',
        duration: 10,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T16:30:00.000Z',
      end: '2023-11-03T16:40:00.000Z',
      resourceId: 55,
      slotIndex: 330,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13936,
        startTime: '2023-11-03T12:40:00-04:00',
        endTime: '2023-11-03T13:40:00-04:00',
        duration: 60,
        status: 'PENDING',
        location: 'GVH-EastWing 1A',
        isTelehealth: false,
        event: {
          name: 'AP Meeting/Admin',
          categoryType: 'Meeting/Admin',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
          {
            resourceId: 18,
            resourceName: 'Jadhav, Vikas V',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 2,
            resourceName: 'Ansari1, Aftab',
            resourceType: 'P',
            isAnchorResource: false,
          },
        ],
        patient: {
          patientGuid: 1078200200,
          firstName: 'JMD Rocks Def',
          middleName: 'JMD Rocks Def',
          lastName: 'JMD Rocks Def',
        },
        category: {
          type: 'event',
          value: 'Meeting/Admin',
        },
      },
      start: '2023-11-03T16:40:00.000Z',
      end: '2023-11-03T17:40:00.000Z',
      resourceId: 55,
      slotIndex: 321,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13950,
        startTime: '2023-11-03T14:00:00-04:00',
        endTime: '2023-11-03T14:30:00-04:00',
        duration: 30,
        status: 'PENDING',
        location: 'GVH-EastWing 1A',
        isTelehealth: false,
        event: {
          name: 'AP Patient Event',
          categoryType: 'Patient Event',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: {
          patientGuid: 1078100200,
          firstName: 'JMD Rocks PE',
          middleName: 'JMD Rocks PE',
          lastName: 'JMD Rocks PE',
        },
        category: {
          type: 'event',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T18:00:00.000Z',
      end: '2023-11-03T18:30:00.000Z',
      resourceId: 55,
      slotIndex: 322,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13962,
        startTime: '2023-11-03T14:40:00-04:00',
        endTime: '2023-11-03T15:05:00-04:00',
        duration: 25,
        status: 'PENDING',
        location: 'GVH-EastWing 1A',
        isTelehealth: false,
        event: {
          name: 'AP Patient Event',
          categoryType: 'Patient Event',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: {
          patientGuid: 1078100200,
          firstName: 'JMD Rocks PE',
          middleName: 'JMD Rocks PE',
          lastName: 'JMD Rocks PE',
        },
        category: {
          type: 'event',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T18:40:00.000Z',
      end: '2023-11-03T19:05:00.000Z',
      resourceId: 55,
      slotIndex: 323,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13951,
        startTime: '2023-11-03T15:05:00-04:00',
        endTime: '2023-11-03T15:35:00-04:00',
        duration: 30,
        status: 'PENDING',
        location: 'GVH-EastWing 1A',
        isTelehealth: false,
        event: {
          name: 'AP Patient Event',
          categoryType: 'Patient Event',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: {
          patientGuid: 1078100200,
          firstName: 'JMD Rocks PE',
          middleName: 'JMD Rocks PE',
          lastName: 'JMD Rocks PE',
        },
        category: {
          type: 'event',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T19:05:00.000Z',
      end: '2023-11-03T19:35:00.000Z',
      resourceId: 55,
      slotIndex: 324,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13956,
        startTime: '2023-11-03T15:20:00-04:00',
        endTime: '2023-11-03T15:50:00-04:00',
        duration: 30,
        status: 'PENDING',
        location: 'GVH-EastWing 1A',
        isTelehealth: false,
        event: {
          name: 'AP Patient Event',
          categoryType: 'Patient Event',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 18,
            resourceName: 'Jadhav, Vikas V',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: {
          patientGuid: 1078100200,
          firstName: 'JMD Rocks PE',
          middleName: 'JMD Rocks PE',
          lastName: 'JMD Rocks PE',
        },
        category: {
          type: 'event',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T19:20:00.000Z',
      end: '2023-11-03T19:50:00.000Z',
      resourceId: 55,
      slotIndex: 325,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13953,
        startTime: '2023-11-03T16:05:00-04:00',
        endTime: '2023-11-03T16:35:00-04:00',
        duration: 30,
        status: 'PENDING',
        location: 'GVH-EastWing 1A',
        isTelehealth: false,
        event: {
          name: 'AP Patient Event',
          categoryType: 'Patient Event',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: {
          patientGuid: 1078100200,
          firstName: 'JMD Rocks PE',
          middleName: 'JMD Rocks PE',
          lastName: 'JMD Rocks PE',
        },
        category: {
          type: 'event',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T20:05:00.000Z',
      end: '2023-11-03T20:35:00.000Z',
      resourceId: 55,
      slotIndex: 326,
    },
    {
      source: 'calendar-view',
      appointment: {
        appointmentId: 13957,
        startTime: '2023-11-03T16:05:00-04:00',
        endTime: '2023-11-03T16:35:00-04:00',
        duration: 30,
        status: 'PENDING',
        location: 'GVH-EastWing 1A',
        isTelehealth: false,
        event: {
          name: 'AP Patient Event',
          categoryType: 'Patient Event',
        },
        notes: '',
        complaint: '',
        resources: [
          {
            resourceId: 18,
            resourceName: 'Jadhav, Vikas V',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: {
          patientGuid: 1078100200,
          firstName: 'JMD Rocks PE',
          middleName: 'JMD Rocks PE',
          lastName: 'JMD Rocks PE',
        },
        category: {
          type: 'event',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T20:05:00.000Z',
      end: '2023-11-03T20:35:00.000Z',
      resourceId: 55,
      slotIndex: 327,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: null,
        timeSlotId: 41,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: {
          firstName: 'AP Reserved Time',
          middleName: 'AP Reserved Time',
          lastName: 'AP Reserved Time',
          birthYear: 0,
          birthMonth: 0,
          birthDay: 0,
          birthTime: '',
          gender: '',
          isEstimatedDob: false,
        },
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T16:45:00',
        endTime: '2023-11-03T17:15:00',
        duration: 30,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T20:45:00.000Z',
      end: '2023-11-03T21:15:00.000Z',
      resourceId: 55,
      slotIndex: 336,
    },
    {
      source: 'calendar-view',
      allocatedTimeSlot: {
        event: {
          name: 'AP Patient Event',
          categoryType: 'Patient Event',
        },
        timeSlotId: 42,
        location: {
          locationName: 'GVH-EastWing 1A',
          locationGuid: 76600610,
        },
        resources: [
          {
            resourceId: 1,
            resourceName: 'Ongmore, John',
            resourceType: 'P',
            isAnchorResource: false,
          },
          {
            resourceId: 55,
            resourceName: 'Patel, Arpan',
            resourceType: 'P',
            isAnchorResource: true,
          },
        ],
        patient: null,
        additionalInformation: '',
        resourceId: 55,
        startTime: '2023-11-03T17:40:00',
        endTime: '2023-11-03T22:40:00',
        duration: 300,
        sourceType: 'ReserveTime',
        category: {
          type: 'ReserveTime',
          value: 'Patient Event',
        },
      },
      start: '2023-11-03T21:40:00.000Z',
      end: '2023-11-04T02:40:00.000Z',
      resourceId: 55,
      slotIndex: 340,
    },
  ];

var newArr = [];

Tests:

Object.assign(origArr)
newArr = Object.assign(origArr);
structuredClone(origArr)
newArr = structuredClone(origArr);
cloneDeep(origArr)
newArr = _.cloneDeep(origArr);

Run results for: angular.copy vs JSON.parse(JSON.stringify()) vs structuredClone AP3

FIguring out the performance differences between using the operations in the name on copying an array of objects considering the fact that other methods of copying (slice, concat, etc.) are shallow copies and end up being by reference instead of by value.

Object.assign(origArr)

structuredClone(origArr)

cloneDeep(origArr)