Inbox is slated to be decomissioned in March 2019 (in ~2 months). While it's still up, I did a comparison of this bug's STR between inbox & gmail, and it looks like gmail is a good bit better here. Here's 2 profiles for each, filtered for "reflow". (When capturing these profiles, I pasted in the attached 10-copies-of-manifesto blurb, and then I started profiling, and then I held down my "a" key for ~10 seconds to type as many "a" characters as possible.) Inbox: https://perfht.ml/2VL0v2V 1.547 seconds https://perfht.ml/2VLsGPA 1.267 seconds Gmail (the current "new gmail" UI with material design etc): https://perfht.ml/2VI8Xjz 0.481 seconds https://perfht.ml/2VIGzOn 0.544 seconds So it looks like gmail is a lot better here. I confirmed that by zooming in, too. - If I zoom in on an inbox profile, I see reflow taking ~6ms to 11ms of refresh driver ticks. E.g. here's a snippet with three long ones: https://perfht.ml/2VR6xPQ - But for gmail, reflow is only 0.5-1ms per refresh driver tick, e.g. here: https://perfht.ml/2VLtRP0 Conclusion: this bug still seems to kinda exist for Inbox, but **does not happen** for Gmail, happily. So, given that Inbox is going away very soon (and its "new gmail" replacement is unaffected), let's call this particular issue WONTFIX. To the extent that this same performance issue exists elsewhere on the web, we can track it in separate bugs.
Bug 1473110 Comment 5 Edit History
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Inbox is slated to be decomissioned in March 2019 (in ~2 months). While it's still up, I did a comparison of this bug's STR between inbox & gmail, and it looks like gmail is a good bit better here. Here's 2 profiles for each, filtered for "reflow". (When capturing these profiles, I pasted in the attached 10-copies-of-manifesto blurb, and then I started profiling, and then I held down my "a" key for ~10 seconds to type as many "a" characters as possible.) Inbox: https://perfht.ml/2VL0v2V 1.547 seconds https://perfht.ml/2VLsGPA 1.267 seconds Gmail (the current "new gmail" UI with material design etc): https://perfht.ml/2VI8Xjz 0.481 seconds https://perfht.ml/2VIGzOn 0.544 seconds So it looks like gmail is a lot better here. I confirmed that by zooming in, too. - If I zoom in on an inbox profile, I see reflow taking ~6ms to 11ms per refresh driver tick. E.g. here's a snippet with three long ones: https://perfht.ml/2VR6xPQ - But for gmail, reflow is only 0.5-1ms per refresh driver tick, e.g. here: https://perfht.ml/2VLtRP0 Conclusion: this bug still seems to kinda exist for Inbox, but **does not happen** for Gmail, happily. So, given that Inbox is going away very soon (and its "new gmail" replacement is unaffected), let's call this particular issue WONTFIX. To the extent that this same performance issue exists elsewhere on the web, we can track it in separate bugs.