I have been working with this repo, GitHub - cecimerelo/BraveNewAlgorithm.jl and running energy benchmarks, as well as performance benchmarks. After upgrading to 1.12, and as measured by an external CLI (pinpoint), the speed has degraded by 10% and the energy consumption by even more, 20%. I’m pre…

Is that intended? Or just teething pains?

[image] JJMerelo: After upgrading to 1.12, and as measured by an external CLI (pinpoint), the speed has degraded by 10% and the energy consumption by even more, 20%. As an aside, how are you measuring energy usage?

I’m using for the time being pinpoint. I’m just now getting around to differentiating between the baseline (energy spent in compilation and so on) and energy actually spent in the execution of the workload. Check out GitHub - cecimerelo/BraveNewAlgorithm.jl for the experiments and GitHub - JJ/brave-…

(Wallclock) Performance degraded when going from 1.11.6 to 1.12

New to Julia

matthias314 October 15, 2025, 1:34pm 2

I just want to point out that in this thread we also noticed a ~10% slowdown with Julia 1.12. In microbenchmarks the difference was even around 40%.

Topic		Replies	Views
Julia 1.11.8 performance up a notch since 1.11.7 (was: down a notch) General Usage performance	4	361	December 16, 2025
Worse runtimes in Julia v1.12 Performance performance , release	20	1643	October 22, 2025
Compile time slowdown from 1.1 to 1.2 Internals & Design	12	2203	November 27, 2019
Julia 1.11 is slower than 1.10? Internals & Design regression	48	4253	October 29, 2024
Julia 1.11 beta high latency Internals & Design	22	3060	April 12, 2024

(Wallclock) Performance degraded when going from 1.11.6 to 1.12

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