MeasureThat.net

Run results for: maintain a fixed list length

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36 Edg/98.0.1108.62
Chrome 98
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
slice 130.4 Ops/sec
splice 5490.6 Ops/sec
shift 745.7 Ops/sec
indexed 934829.8 Ops/sec
Script Preparation code:
​x
 
​
var list = [];
for (var i = 0; i < 1000 * 1000; i++) {
  list.push(i);
}
idx = 0;
Tests:

  • slice

     
    list.push('slice');
    list = list.slice(1);
    ​

  • splice

     
    list.push('splice');
    list.splice(0, 1);

  • shift

     
    list.push('splice');
    list.shift();

  • indexed

     
    list[idx] = 'splice';
    idx = (idx++) % list.length;
    // Needs some formatting when you actually need to use the list
    ​