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by ebidel
2900 days ago
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Yes and no. In some cases (3rd party content that you don't control), there's no way to know what script/iframe is going to do/use. For example, ads script that uses `document.write()` and kills perf. Turning on certain policies can also help you be certain quality/standards are being met across your site. For example, the creative team forgets to optimize images and you end up shipping many more MBs of images than actually needed. The `image-compression` feature policy could be used as a gut check to make sure that never happens. |
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