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I noticed that the latest RC [Version 0.99.126.4.1.7-rc (WebKit 619.1.1) Build date Feb 20 2024[ felt sluggish and ran it through Browser Bench versus previous beta/RC and it does measure slower.

Version 0.99.126.4.1-beta (WebKit 618.1.2)
Build date Dec 14 2023
Final: 138 / Peak under Details: 147

Version 0.99.126.4.1.6-rc (WebKit 619.1.1)
Build date Feb 8 2024
Final: 136 / Peak under Details:141

Version 0.99.126.4.1.7-rc (WebKit 619.1.1)
Build date Feb 20 2024
Final: 126 / Peak under Details: 129

Interestingly watching the progress bar on the most recent RC, it just looks like it is struggling. Whereas the earlier versions appear to accelerate towards the end, the most recent RC is sluggish all the way through.

This is on a MacBook Air i3 running Catalina. Ran benchmark on each browser at least twice and also tried running older and newer versions in different order just to make sure that wasn't affecting results.

Expected Version 0.99.126.4.1.7-rc (WebKit 619.1.1) to benchmark (as well as feel) as fast as Version 0.99.126.4.1.6-rc (WebKit 619.1.1) [and ideally Version 0.99.126.4.1-beta (WebKit 618.1.2) which appears fastest so far but understand performance regressions are possible between WebKit versions]

Overarching desire is for "snappiness". Somehow Version 0.99.126.4.1-beta (WebKit 618.1.2) had it. If different RC versions have additional debug options enabled no problem and understand the final version will likely restore.

Version 0.99.126.4.1.7-rc (WebKit 619.1.1)

Catalina (10.15)

  • Vlad replied to this.

    bzgnyc Intermediate RC versions are not optimized and should not be benchmarked against.

        Vlad Good to know and won't benchmark intermediate RC versions in the future. When I noticed it felt slower just wanted to report sooner rather than later (i.e. figured easier to track down in the moment rather than a far off official RC).

        FYI, I just tested the latest release RC [Version 0.99.126.4.1.8-rc (WebKit 619.1.1) Build date Feb 29 2024] on the same machine (MacBook Air running Catalina) and the performance drop persisted from the Feb 20th intermediate RC to this official RC (i.e. performance is measurably lower than the Dec 14 and Feb 8 RC on my system).

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