(In reply to :Gijs (he/him) from comment #4) > There is some noise in the profile in the parent due to uBO - can you re-profile without it to compare apples to apples? Thats surprising.. the tab with the testcase had uBlock disabled. Anyway, i reprofiled on a fresh firefox profile. Here is the prpfile: https://share.firefox.dev/43zP7MU . Also updated comment 0 with it.
Bug 1957692 Comment 5 Edit History
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(In reply to :Gijs (he/him) from comment #4) > There is some noise in the profile in the parent due to uBO - can you re-profile without it to compare apples to apples? Thats surprising.. the tab with the testcase had uBlock disabled. Anyway, i reprofiled on a fresh firefox profile. Here is the prpfile: https://share.firefox.dev/43zP7MU . Also updated comment 0 with it. -------------------------------- (In reply to :Gijs (he/him) from comment #4) > Not really, there's no jank markers in the parent. I suspect (but am not sure how to verify) that each form submission is generating a separate JSWindowActor IPC message, and processing those in the parent fills up the event queue which is going to lead to the unresponsivenes, but each of the messages themselves processes quickly so there's no hang marker. N=100 With IPC marking: https://share.firefox.dev/3Eeg26t