fix: Prevent fetch errors loops with invalid fetch implementations #3318
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kamilogorek
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mitsuhiko
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Mar 10, 2021
This was referenced Mar 11, 2021
This was referenced Mar 15, 2021
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sod
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Mar 19, 2021
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| const sandbox = document.createElement('iframe'); | ||
| sandbox.hidden = true; | ||
| document.head.appendChild(sandbox); | ||
| if (sandbox.contentWindow?.fetch) { | ||
| return sandbox.contentWindow.fetch.bind(global); | ||
| } | ||
| document.head.removeChild(sandbox); |
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This is so slow, that it doesn't execute below 50ms for mobile lighthouse. Thus it delays the TTI metric plus adds to TBT in lighthouse, even if you only execute install in a single macrotask, thus including sentry now costs you points in mobile lighthouse and lowers your ranking on google.
desktop
mobile
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This was 6.0.1 btw., so quite some regression
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Thanks for letting us know, should be patched in #3341
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