Run results for: Do TypedArrays slow down when you add attributes to them?

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Browser: Chrome 53

Operating system: Mac OS X 10.11.6

Device Platform: Other

Date tested: 7 years ago

Test name	Executions per second
without attributes	1115.5 Ops/sec
with attributes	1115.4 Ops/sec

Script Preparation code:

var array = new Float32Array(10000);
var array_with_attributes = new Float32Array(10000);
array_with_attributes.foo = 1;

Tests:

without attributes
for (var i = 0, li = array.length; i < li; i++) { array[i] = i; }
with attributes
for (var i = 0, li = array_with_attributes.length; i < li; i++) { array_with_attributes[i] = i; }