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Editorial Team
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Asked: 2026-05-23T20:05:26+00:00

I’m getting a huge dataset from a client’s internal API. It’ll contain a bunch

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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.

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1 Answer

  1. Editorial Team

    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 <- totally unfair, ran on virtual machine
Opera 11   | 5.2 million

    This is far from an exhaustive survey; but at a rough minimum of over 600 thousand calls per second (and that on a virtual machine), I think you should be good.

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