Improve startup performance by using promise.all when processing rooms from sync#5095
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this sped up my launch time by 6x and didn't OOM anything. shipit! |
ara4n
approved these changes
Jan 26, 2026
t3chguy
approved these changes
Jan 27, 2026
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When EW starts, it first processes a huge sync response from the sync accumulator. Testing on my account, a large chunk of the work is just processing the joined rooms. We can improve the performance of this code if we switch to
promise.all.Shaves off more than 20 seconds from startup time on my account (30-35 seconds vs 10 seconds).