Run results for: unshift vs spread operator v2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/111.0

Browser: Firefox 111

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
unshift	3901653.0 Ops/sec
spread	1971376.0 Ops/sec

Tests:

unshift
const states = [ { "name": "Alabama", "abbreviation": "AL" }, { "name": "Alaska", "abbreviation": "AK" }, { "name": "Arizona", "abbreviation": "AZ" }, { "name": "Arkansas", "abbreviation": "AR" }, { "name": "California", "abbreviation": "CA" }, { "name": "Colorado", "abbreviation": "CO" }, { "name": "Connecticut", "abbreviation": "CT" }, { "name": "Delaware", "abbreviation": "DE" }, { "name": "District Of Columbia", "abbreviation": "DC" }, { "name": "Florida", "abbreviation": "FL" }, { "name": "Georgia", "abbreviation": "GA" }, { "name": "Hawaii", "abbreviation": "HI" }, { "name": "Idaho", "abbreviation": "ID" }, { "name": "Illinois", "abbreviation": "IL" }, { "name": "Indiana", "abbreviation": "IN" }, { "name": "Iowa", "abbreviation": "IA" }, { "name": "Kansas", "abbreviation": "KS" }, { "name": "Kentucky", "abbreviation": "KY" }, { "name": "Louisiana", "abbreviation": "LA" }, { "name": "Maine", "abbreviation": "ME" }, { "name": "Maryland", "abbreviation": "MD" }, { "name": "Massachusetts", "abbreviation": "MA" }, { "name": "Michigan", "abbreviation": "MI" }, { "name": "Minnesota", "abbreviation": "MN" }, { "name": "Mississippi", "abbreviation": "MS" }, { "name": "Missouri", "abbreviation": "MO" }, { "name": "Montana", "abbreviation": "MT" }, { "name": "Nebraska", "abbreviation": "NE" }, { "name": "Nevada", "abbreviation": "NV" }, { "name": "New Hampshire", "abbreviation": "NH" }, { "name": "New Jersey", "abbreviation": "NJ" }, { "name": "New Mexico", "abbreviation": "NM" }, { "name": "New York", "abbreviation": "NY" }, { "name": "North Carolina", "abbreviation": "NC" }, { "name": "North Dakota", "abbreviation": "ND" }, { "name": "Ohio", "abbreviation": "OH" }, { "name": "Oklahoma", "abbreviation": "OK" }, { "name": "Oregon", "abbreviation": "OR" }, { "name": "Pennsylvania", "abbreviation": "PA" }, { "name": "Rhode Island", "abbreviation": "RI" }, { "name": "South Carolina", "abbreviation": "SC" }, { "name": "South Dakota", "abbreviation": "SD" }, { "name": "Tennessee", "abbreviation": "TN" }, { "name": "Texas", "abbreviation": "TX" }, { "name": "Utah", "abbreviation": "UT" }, { "name": "Vermont", "abbreviation": "VT" }, { "name": "Virginia", "abbreviation": "VA" }, { "name": "Washington", "abbreviation": "WA" }, { "name": "West Virginia", "abbreviation": "WV" }, { "name": "Wisconsin", "abbreviation": "WI" }, { "name": "Wyoming", "abbreviation": "WY" } ]; states.unshift({"name": '', "abbreviation": ''});
spread
const states = [ { "name": "Alabama", "abbreviation": "AL" }, { "name": "Alaska", "abbreviation": "AK" }, { "name": "Arizona", "abbreviation": "AZ" }, { "name": "Arkansas", "abbreviation": "AR" }, { "name": "California", "abbreviation": "CA" }, { "name": "Colorado", "abbreviation": "CO" }, { "name": "Connecticut", "abbreviation": "CT" }, { "name": "Delaware", "abbreviation": "DE" }, { "name": "District Of Columbia", "abbreviation": "DC" }, { "name": "Florida", "abbreviation": "FL" }, { "name": "Georgia", "abbreviation": "GA" }, { "name": "Hawaii", "abbreviation": "HI" }, { "name": "Idaho", "abbreviation": "ID" }, { "name": "Illinois", "abbreviation": "IL" }, { "name": "Indiana", "abbreviation": "IN" }, { "name": "Iowa", "abbreviation": "IA" }, { "name": "Kansas", "abbreviation": "KS" }, { "name": "Kentucky", "abbreviation": "KY" }, { "name": "Louisiana", "abbreviation": "LA" }, { "name": "Maine", "abbreviation": "ME" }, { "name": "Maryland", "abbreviation": "MD" }, { "name": "Massachusetts", "abbreviation": "MA" }, { "name": "Michigan", "abbreviation": "MI" }, { "name": "Minnesota", "abbreviation": "MN" }, { "name": "Mississippi", "abbreviation": "MS" }, { "name": "Missouri", "abbreviation": "MO" }, { "name": "Montana", "abbreviation": "MT" }, { "name": "Nebraska", "abbreviation": "NE" }, { "name": "Nevada", "abbreviation": "NV" }, { "name": "New Hampshire", "abbreviation": "NH" }, { "name": "New Jersey", "abbreviation": "NJ" }, { "name": "New Mexico", "abbreviation": "NM" }, { "name": "New York", "abbreviation": "NY" }, { "name": "North Carolina", "abbreviation": "NC" }, { "name": "North Dakota", "abbreviation": "ND" }, { "name": "Ohio", "abbreviation": "OH" }, { "name": "Oklahoma", "abbreviation": "OK" }, { "name": "Oregon", "abbreviation": "OR" }, { "name": "Pennsylvania", "abbreviation": "PA" }, { "name": "Rhode Island", "abbreviation": "RI" }, { "name": "South Carolina", "abbreviation": "SC" }, { "name": "South Dakota", "abbreviation": "SD" }, { "name": "Tennessee", "abbreviation": "TN" }, { "name": "Texas", "abbreviation": "TX" }, { "name": "Utah", "abbreviation": "UT" }, { "name": "Vermont", "abbreviation": "VT" }, { "name": "Virginia", "abbreviation": "VA" }, { "name": "Washington", "abbreviation": "WA" }, { "name": "West Virginia", "abbreviation": "WV" }, { "name": "Wisconsin", "abbreviation": "WI" }, { "name": "Wyoming", "abbreviation": "WY" } ]; const newStates = [{"name": '', "abbreviation": ''}, ...states];