Run results for: array tests

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36

Browser: Chrome 86

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
spliceFilterThis	19250.4 Ops/sec
pushFilterThis	57343.8 Ops/sec
spliceFilter	28726.4 Ops/sec
filter	49672.4 Ops/sec
pushFilter	316751.8 Ops/sec

Script Preparation code:

  var array = [];
  for (var idx = 0; idx < 1000; idx++) {
    array[idx] = idx;
  }
  
  function oddNum(item) {
    return item % 2;
  }
  
  // Create a new array and push to it
  Array.prototype.pushFilter = function(condition) {
    // Create a new array and push to it
    var result = [],
        i, len;
    for(i = 0, len = this.length; i < len; i++) {
      if (condition(this[i], i, this)) 
        result.push(this[i]);
    }
    return result;
  };
  
  // Clone array and then remove items
  Array.prototype.spliceFilter = function(condition) {
    var result = this.slice(),
        i = result.length;
    while (i--) {
      if (!condition(result[i], i, this))
        result.splice(i, 1);
    }
    return result;
  };
  
  // Create a new array and push to it with 'this' arg
  Array.prototype.pushFilterThis = function(condition, thisArg) {
    // Create a new array and push to it
    var result = [],
        i, len;
    for(i = 0, len = this.length; i < len; i++) {
      if(condition.call(thisArg, this[i], i, this)) 
        result.push(this[i]);
    }
    return result;
  };
  
  // Clone array and then remove items with 'this' arg
  Array.prototype.spliceFilterThis = function(condition, thisArg) {
    var result = this.slice(),
        i = result.length;
    while (i--) {
      if (!condition.call(thisArg, result[i], i, this))
        result.splice(i, 1);
    }
    return result;
  };

Tests:

spliceFilterThis
var result = array.spliceFilterThis(oddNum, {});
pushFilterThis
var result = array.pushFilterThis(oddNum, {});
spliceFilter
var result = array.spliceFilter(oddNum);
filter
var result = array.filter(oddNum);
pushFilter
var result = array.pushFilter(oddNum);

Run results for: array tests

lol

spliceFilterThis

pushFilterThis

spliceFilter

filter

pushFilter