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code review: use setIcon w/ ImageData only for chromium-based browsers

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Raymond Hill 2018-05-09 08:08:19 -04:00
parent 82e5fa61b9
commit a9a1cc3f3b
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1 changed files with 11 additions and 6 deletions
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17
platform/chromium/vapi-background.js
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@ -667,12 +667,17 @@ vAPI.setIcon = (function() {
});
}
if (
vAPI.webextFlavor.soup.has('chromium') === false &&
vAPI.webextFlavor.soup.has('firefox') === false
) {
return;
}
// As of 2018-05, benchmarks show that only Chromium benefits for sure
// from using ImageData.
//
// Chromium creates a new ImageData instance every call to setIcon
// with paths:
// https://cs.chromium.org/chromium/src/extensions/renderer/resources/set_icon.js?l=56&rcl=99be185c25738437ecfa0dafba72a26114196631
//
// Firefox uses an internal cache for each setIcon's paths:
// https://searchfox.org/mozilla-central/rev/5ff2d7683078c96e4b11b8a13674daded935aa44/browser/components/extensions/parent/ext-browserAction.js#631
if ( vAPI.webextFlavor.soup.has('chromium') === false ) { return; }
let imgs = [
{ i: 0, p: '16' }, { i: 0, p: '32' },
{ i: 1, p: '16' }, { i: 1, p: '32' },