Startup time of 1000 packages I think startup time is a big deal for Julia, especially for new users. If it takes a long time to load a package, it makes Julia look bad. Recently, Julia 1.12 beta was released, and I noticed that the load times are higher than before. Talking to other package develo…

Haha I didn’t know you had just set it up a minute ago, thanks for making that data available!

Here is the detailed runner info: [image] Runner Server Configuration · JuliaEcosystemBenchmarks... Ubuntu 2024 LTS 128GB ram AMD Ryzen 7 5700G More detailed info stefan@kr-amherst ~> sudo lshw [sudo] password for stefan: kr-amherst description: Desktop Computer product: B550M AORUS PRO…

I was thinking something like this: [image] ▶ Code

That is great, here are a few comments: The named versions alpha, lts, etc, probably need to be filtered out or changed to include only the last handful of results because lts includes all versions that were historically lts, not just the current lts (some for the other named versions) Median migh…

maybe it would make sense to store commit hashes or something for the changing specifiers? Otherwise it gets a bit complicated to map them back I guess

That is available deep in the logs and can be added to the csv (at some point).

The discussion seems to be burying the lead a bit - from the plot it looks like 1.12 does not have a major regression compared to 1.10, correct?

If I look at my CI jobs: Bump actions/checkout from 4 to 5 (#252) CI #2207 Bump actions/checkout from 4 to 5 (#252) CI #2207 …

And when I do the same comparison with GMT it takes ~12-13 minutes with 1.10 and 24-25 with 1.11. 1.12 and nightly. And this despite significant improvements achieved after important reductions in invalidations on 1.12.

[image] joa-quim: And when I do the same comparison with GMT it takes ~12-13 minutes with 1.10 and 24-25 with 1.11. 1.12 and nightly. Did you create an issue for this regression at GitHub · Where software is built ?

Startup time of 1000 packages – 53% slower in Julia 1.12 vs 1.10

Internals & Design

christiangnrd October 14, 2025, 1:22am 73

I just switched over our benchmark CI to 1.12. Over 1.12, Import is a 10% improvement, precompile is a slight regression, and TTFX (compiling an empty kernel) takes 55% longer

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Startup time of 1000 packages – 53% slower in Julia 1.12 vs 1.10

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