Benchmark: Array Flatten -> Reduce+Concat | Reduce+Spread | Loop+Push| Loop+Push+Spread

Script Preparation code:

var params = [ [ 1, 2 ], [ 3, 4 ], [ 5, 6 ], [ 7, 8 ], [ 9, 0 ] ];

var flattenReduceConcat = (inputs) => inputs.reduce((acc, input) => acc.concat(input), []);
var flattenReduceSpread = (inputs) => inputs.reduce((acc, input) => [...acc, ...input], []);
var flattenLoopPush = (inputs) => {
  var acc = [];
  for (var i = 0, L = inputs.length; i < L; i++) {
    var input = inputs[i];
    for (var j = 0, l = input.length; j < l; j++) {
      acc.push(input[j]);
    }
  }
  return acc;
}
var flattenLoopPushSpread = (inputs) => {
  var acc = [];
  for (var i = 0, l = inputs.length; i < l; i++) {
    acc.push(...inputs[i]);
  }
  return acc;
}
var flattenLoopSpread = (inputs) => {
  var acc = [];
  for (var i = 0, l = inputs.length; i < l; i++) {
    acc = [...acc, ...inputs[i]];
  }
  return acc;
}

Tests:

Reduce+Concat
var result = flattenReduceConcat(params);
Reduce+Spread
var result = flattenReduceSpread(params);
Loop+Push
var result = flattenLoopPush(params);
Loop+Push+Spread
var result = flattenLoopPushSpread(params);
Loop+Spread
var result = flattenLoopSpread(params);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Reduce+Concat
Reduce+Spread
Loop+Push
Loop+Push+Spread
Loop+Spread

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser/OS: Chrome 69 on Mac OS X 10.14.0

View result in a separate tab

Test name	Executions per second
Reduce+Concat	694926.1 Ops/sec
Reduce+Spread	1883225.0 Ops/sec
Loop+Push	4069431.0 Ops/sec
Loop+Push+Spread	2978232.0 Ops/sec
Loop+Spread	1685310.0 Ops/sec

Array Flatten -> Reduce+Concat | Reduce+Spread | Loop+Push| Loop+Push+Spread | Loop+Spread (version: 0)

Comparing performance of: Reduce+Concat vs Reduce+Spread vs Loop+Push vs Loop+Push+Spread vs Loop+Spread

Created: 5 years ago by: Guest

Jump to the latest result

Reduce+Concat

Reduce+Spread

Loop+Push

Loop+Push+Spread

Loop+Spread

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A