Benchmark: Temp obj or in check

Temp obj or in check (version: 4)

Is it faster to test if an object contains a sub-object before looking up keys on it, or substituting an empty object in a falsy check

Comparing performance of: Empty object with short method vs Empty object with long method vs Full object with short method vs Full object with long method vs Empty object with shorter method vs Full object with shorter method

Created: 7 years ago by: Registered User

Jump to the latest result

Script Preparation code:

var haystack = {};
var SIZE = 10000;
for (var i = 0; i < SIZE; i++) { haystack['a' + i] = i; }
var objA = {};
var objB = { haystack: haystack };
function get1(obj, key) { return (obj.haystack || {})[key] || -1; }
function get2(obj, key) { return (obj.haystack && key in obj.haystack) ? obj.haystack[key] : -1; }
function get3(obj, key) { return obj.haystack && obj.haystack[key] || -1; }
function randomKey() { return 'a' + Math.floor(Math.random() * SIZE); }

Tests:

Empty object with short method
get1(objA, randomKey());
Empty object with long method
get2(objA, randomKey());
Full object with short method
get1(objB, randomKey());
Full object with long method
get2(objB, randomKey());
Empty object with shorter method
get3(objA, randomKey());
Full object with shorter method
get3(objB, randomKey());

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Empty object with short method
Empty object with long method
Full object with short method
Full object with long method
Empty object with shorter method
Full object with shorter method

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.75 Safari/537.36

Browser/OS: Chrome 55 on Windows

View result in a separate tab

Test name	Executions per second
Empty object with short method	989850.9 Ops/sec
Empty object with long method	1219277.0 Ops/sec
Full object with short method	1080830.0 Ops/sec
Full object with long method	998664.9 Ops/sec
Empty object with shorter method	1209608.0 Ops/sec
Full object with shorter method	1084573.0 Ops/sec

Temp obj or in check (version: 4)

Is it faster to test if an object contains a sub-object before looking up keys on it, or substituting an empty object in a falsy check

Comparing performance of: Empty object with short method vs Empty object with long method vs Full object with short method vs Full object with long method vs Empty object with shorter method vs Full object with shorter method

Created: 7 years ago by: Registered User

Jump to the latest result

Empty object with short method

Empty object with long method

Full object with short method

Full object with long method

Empty object with shorter method

Full object with shorter method

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A