Object literals vs object properties

JavaScript performance comparison

Test case created on 30th September 2012

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Test Ops/sec

Testing in unknown unknown
Test	Ops/sec
Object literal	`window.foo = { a:'a', b:'b', c:'c', d:'d', e:'e', f:'f', g:'g', h:'h', i:'i' }`	pending…
Assignment	`var foo = {} foo.a = 'a'; foo.b = 'b'; foo.c = 'c'; foo.d = 'd'; foo.e = 'e'; foo.f = 'f'; foo.g = 'g'; foo.h = 'h'; foo.i = 'i'; window.foo = foo;`	pending…
Object literal + compilation padding (for blind merging without trailing comma)	`window.foo = { a:'a', b:'b', c:'c', d:'d', e:'e', f:'f', g:'g', h:'h', i:'i', pad: undefined } delete window.foo.pad;`	pending…

Object literal

window.foo = {
  a:'a',
  b:'b',
  c:'c',
  d:'d',
  e:'e',
  f:'f',
  g:'g',
  h:'h',
  i:'i'
}

pending…

Assignment

var foo = {}
foo.a = 'a';
foo.b = 'b';
foo.c = 'c';
foo.d = 'd';
foo.e = 'e';
foo.f = 'f';
foo.g = 'g';
foo.h = 'h';
foo.i = 'i';
window.foo = foo;

pending…

Object literal + compilation padding (for blind merging without trailing comma)

window.foo = {
  a:'a',
  b:'b',
  c:'c',
  d:'d',
  e:'e',
  f:'f',
  g:'g',
  h:'h',
  i:'i',
  pad: undefined
}
delete window.foo.pad;

pending…

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