QuirksBlog - Browser testing

Part of Theory.

Reading out the end time in browser speed tests

Permalink | in Browser testing
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A few weeks back I did some DOM speed tests on mobile browsers (results forthcoming). The most important result of these tests is not the actual values (although they’re interesting), but the fact that I could finally prove a theory that I’ve had in the back of my mind for at least two years now.

Basically, when setting up a speed test you should be very careful to allow the browser to render the result on screen before you close the test by reading out the second timestamp.

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A note on testing methodology

Permalink | in Browser testing
19 comments (closed)

In his recent Feature testing CSS properties entry, Juriy Zaytsev (Kangax) discusses the possibility of detecting CSS support by means of JavaScript. Although he rightly points out that this method has its drawbacks, as far as I’m concerned he doesn’t go far enough.

This sort of testing should not be used at all. Ever. The methodology is plain wrong. Browser compatibility tests are to be done by hand. Any automated system is useless, because it will give false information.

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This is the blog of Peter-Paul Koch, web developer, consultant, and trainer. You can also follow him on Twitter or Mastodon.
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