Benchmark: weakmap vs closure vs private symbols

Script Preparation code:

function A() {
	var x = 0;
	return {
		incr() { x ++ },
		get() { return x },
	}
}
var closure = A();
closure.incr()

var wm = new WeakMap();
function B() {
	var x = {
		incr() { wm.set(x, (wm.get(x) || 0) + 1) },
		get() { return wm.get(x) },
	}
	return x
}
var weakmap = B();
weakmap.incr()


function C() {
	var me = Symbol('me');
	var x = {
		incr() { x[me]++ },
		get() { return x[me] },
		[me]: 0,
	}
	return x
}
var symbols = C();
symbols.incr()

Tests:

closure get
closure.get()
weakmap get
weakmap.get()
closure incr
closure.incr()
weakmap incr
weakmap.incr()
symbol incr
symbols.incr()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
closure get
weakmap get
closure incr
weakmap incr
symbol incr

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one month ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
closure get	28150440.0 Ops/sec
weakmap get	13089010.0 Ops/sec
closure incr	27556230.0 Ops/sec
weakmap incr	8385952.0 Ops/sec
symbol incr	28029070.0 Ops/sec

weakmap vs closure vs private symbols (version: 0)

Comparing performance of: closure get vs weakmap get vs closure incr vs weakmap incr vs symbol incr

Created: 5 years ago by: Guest

Jump to the latest result

closure get

weakmap get

closure incr

weakmap incr

symbol incr

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A