How fast is parseFloat Vs. float ints in JavaScript?-Collection of common programming errors

11 years ago
admin
1 minute

I’m getting a huge dataset from a client’s internal API. It’ll contain a bunch of numerical data of prices such as: $31.23. He gives them to me as {"spend":"21.23"} which is fine, but I was concerned that after 1000+ items and running parseFloat() on all of those values (on top of graphing them) might be resource heavy on the client’s browser.

Has anyone done this?

==Update==

I’m sorry. My question was too vague. My concern was that it’s a string and i’m parsing it. My issue was is parseFloat faster than just an int. I.e. is appending parseFloat("12.12") to a div faster than simply just appending 12.12 and if so, how much faster.

  1. On my work machine (Mac OS X, Intel 2 GHz Core i7), I saw the following results on jsperf.com:

    Browser    | parseFloat calls per second
----------------------------------------
Chrome 12  | 5.3 million
Firefox 6  | 21.7 million
IE 8       | 666.9 thousand