Benchmark: Object.assign vs conditionals

HTML Preparation code:

<!--your preparation HTML code goes here-->

Tests:

Object.assign
/*When writing async/deferred tests, use `deferred.resolve()` to mark test as done*/ const theObject = {the_first_key: 42, the_second_key: 100}; const newObject = {third: 99, fourth: 202}; Object.assign(theObject, newObject);
Conditionals
/*When writing async/deferred tests, use `deferred.resolve()` to mark test as done*/ const theObject = {the_first_key: 42, the_second_key: 100}; const newObject = {third: 99, fourth: 202}; if (newObject.one !== undefined) { theObject.one = newObject.one; } if (newObject.two !== undefined) { theObject.two = newObject.two; } if (newObject.third !== undefined) { theObject.third = newObject.third; } if (newObject.fourth !== undefined) { theObject.fourth = newObject.fourth; }

Rendered benchmark preparation results:

Previous results

Test case name	Result
Object.assign
Conditionals

Latest run results:

Run details: (Test run date: 26 days ago)

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0

Browser/OS: Firefox 152 on Ubuntu

Conditionals

20.4M/s

Object.assign

9.8M/s

View exact numbers

Test name	Executions per second
✓ Conditionals	20,382,438 Ops/sec
Object.assign	9,828,228 Ops/sec

Object.assign vs conditionals (version: 1)