Run results for: Grouping vs Foreach

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.132 Safari/537.36

Browser: Chrome 76

Operating system: Linux

Device Platform: Desktop

Date tested: 5 years ago

Test name	Executions per second
GroupBy	26673.6 Ops/sec
Foreach	42348.5 Ops/sec

HTML Preparation code:

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Script Preparation code:

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Tests:

GroupBy
var ganttData = {tasks:[], links: []}; const mapProject = (id, text, startDate, endDate, parent) => { return { id, text, unscheduled: Boolean(startDate || endDate), duration: 0, type: 'project', open: true, start_date: startDate, end_date: endDate, parent } } const mapTask = (id, text, type, startDate, endDate, parent) => { const unscheduled = !Boolean(startDate && endDate); return { id, text, unscheduled, duration: !unscheduled ? moment(endDate).diff(startDate, 'hours') : 0, type, // open: true, start_date: startDate, end_date: endDate, parent } } const mapLink = (d) => { return { id: d.ID, source: d.DependentActivityId, target: d.SourceActivityId, type: d.DependencyType, } } _.chain(activities) .groupBy("GroupID") .map((groupedActivities, groupId) => { if (groupId !== 'null') { const earliestActivity = _.minBy(groupedActivities, a => a.StartDateTimePlanned); const earliestActivityStartDate = earliestActivity && earliestActivity.StartDateTimePlanned? new Date(earliestActivity.StartDateTimePlanned): undefined const latestActivity = _.maxBy(groupedActivities, a => a.EndDateTimePlanned); const latestActivityEndDate = latestActivity && latestActivity.EndDateTimePlanned? new Date(latestActivity.EndDateTimePlanned): undefined ganttData.tasks.push(mapProject(groupId, groupedActivities[0].GroupName, earliestActivityStartDate, latestActivityEndDate, undefined)); } const tasks = groupedActivities.map(a => mapTask(a.ID, a.Name, a.IsMilestone ? 'milestone' : 'task', a.StartDateTimePlanned? new Date(a.StartDateTimePlanned): undefined, a.EndDateTimePlanned? new Date(a.EndDateTimePlanned): undefined, groupId !== 'null'? groupId : undefined)) ganttData.tasks.push(...tasks); const links = _.flatMap(groupedActivities, i => i.Dependencies.map(mapLink)); ganttData.links.push(...links); }) .value(); console.log(ganttData)
Foreach
var ganttData = {tasks:[], links: []}; activities.reduce((tasks, activity) => { const start = activity.StartDateTimePlanned; const end = activity.EndDateTimePlanned; const task = { id: activity.ID, text: activity.Name, unscheduled: true, duration: 0, type: activity.IsMilestone ? 'milestone' : 'task', parent: activity.GroupID } let group; if (activity.GroupID && activity.GroupName) { group = tasks.find(g => g.id === activity.GroupID) if (!group) { group = { id: activity.GroupID, text: activity.GroupName, unscheduled: true, duration: 0, type: 'project', open: true } tasks.push(group) } } if (start && end) { const startDate = new Date(start); const endDate = new Date(end); task.start_date = startDate; task.duration = moment(endDate).diff(startDate, 'hours'); task.unscheduled = false; if (group) { group.unscheduled = false; if (group.start_date === undefined || (group.start_date instanceof Date && startDate < group.start_date)) { group.start_date = startDate; } if (group.end_date === undefined || (group.end_date instanceof Date && endDate > group.end_date)) { group.end_date = endDate; } } } tasks.push(task); if (activity.Dependencies) { ganttData.links = ganttData.links.concat(activity.Dependencies.map((d) => ({ id: d.ID, source: d.DependentActivityId, target: d.SourceActivityId, type: d.DependencyType }))) } return tasks }, ganttData.tasks); console.log(ganttData);

Run results for: Grouping vs Foreach

GroupBy

Foreach