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POwhy are chrome and firefox are 10x slower than curl at downloading a super small javascript file?
 

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  1. POwhy are chrome and firefox are 10x slower than curl at downloading a super small javascript file?
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    <p>I work on a web application in which the dev environment loads about 500 js files from a local web server (I've tried both IIS and apache). These files are optimized in prod, but for development that's what we have. I know there are other strategic options that might prevent the need to load so many js files, but that's currently out of my hands. What I'd like to do is speed up these requests. Am I crazy to think that each of these requests could only take 10ms, so that the whole request could take 5s (10ms * 500 requests)? Currently both chrome and firefox are reporting that these requests take about 100ms (even for 304s). </p> <p>I took this down to the smallest common denominator and created a 1 line js file. I issue a request to this file through firefox and chrome and each report that it takes >100ms. What's odd, though, is that when I make the same request from curl, it only takes 5ms-ish:</p> <pre><code>$ curl 'http://10.222.139.56:81/js/ben.js' -o /dev/null -w '%{time_total}' 0.005 </code></pre> <p>What gives? I would think the curl number is correct? Why are chrome and firefox taking longer?</p>
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    1. USandersonbd1
    1. USandersonbd1
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    1. CO**500 JavaScript files** ... wow
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      1. POwhy are chrome and firefox are 10x slower than curl at downloading a super small javascript file?
      1. USPointy
    2. COAre we sure that FF/Chrome are *only* timing the actual download, or does that include turning it into bytecode/etc? I don't know, but it would account for a difference.
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      1. POwhy are chrome and firefox are 10x slower than curl at downloading a super small javascript file?
      1. USDave Newton
    3. COAre your local webserver loads js files from you local storage? I just checked mine, half JS files goes from cache (0ms) and half loads with ~10ms.
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      1. POwhy are chrome and firefox are 10x slower than curl at downloading a super small javascript file?
      1. USBrock
 

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