sparse arrays vs objects (v8)

Revision 8 of this benchmark created on

Setup

window.obj = {};/*
    for (var i=0; i<500; i++)
        obj[i*1000] = i;
    */
    window.arr = [];/*
    for (var i=0; i<500; i++)
        arr[i*1000] = i*1000;
    */
    window.arrNull = [];
    /*
    for (var i=0; i<500*1000; i++)
        arrNull[i] = i % 1000 === 0 ? i : null;
    */

Test runner

Ready to run.

Testing in
TestOps/sec
object set
obj = {}
for (var i=0; i<500; i++)
    obj[i*1000] = i;
 
ready
array set
arr = [];
for (var i=0; i<500; i++)
    arr[i*1000] = i;
 
ready
array null set
arrNull = [];
for (var i=0; i<500*1000; i++)
    arrNull[i] = i % 1000 === 0 ? i : null;
ready

Revisions

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