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Run results for:
Array initialization: preallocate vs push (Objects)
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Run details:
User agent:
Mozilla/5.0 (X11; Linux x86_64; rv:127.0) Gecko/20100101 Firefox/127.0
Browser:
Firefox 127
Operating system:
Linux
Device Platform:
Desktop
Date tested:
one year ago
Test name
Executions per second
Preallocate
13.1 Ops/sec
Push
12.4 Ops/sec
Tests:
Preallocate
var N = 1000000; var result = new Array(N); for (var i = 0; i < N; i++) { result[i] = { value: N }; }
Push
var N = 1000000; var result = []; for (var i = 0; i < N; i++) { result.push({ value: N }); }