sefeng, can you clarify if that range is for things getting better vs. getting worse? (I'm not sure it makes sense for bug 1653064's patches (the only things in the range you linked) to have any perf impact at all, positive or negative; though emilio can confirm.)
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sefeng, can you clarify if that range is for things getting better vs. getting worse? (I'm not sure it makes sense for bug 1617472's patches (the only things in the range you linked) to have any perf impact at all, positive or negative; though emilio can confirm.)