# \#jit

**URL:** https://discourse.julialang.org/tag/jit/599.md

[Latest](https://discourse.julialang.org/latest.md) · [Categories](https://discourse.julialang.org/categories.md) · [Tags](https://discourse.julialang.org/tags.md)

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## [Julia vs Numba](https://discourse.julialang.org/t/julia-vs-numba/137116)

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**Author:** [@lilachint](https://discourse.julialang.org/u/lilachint)\
**Replies:** 11\
**Last updated:** [May 17, 2026, 7:18am UTC](https://discourse.julialang.org/t/julia-vs-numba/137116 "2026-05-17T07:18:51Z")

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I used to use Numpy+Numba for some parallel computations with @nb.njit and nb.prange in Python. How does Julia compare to that? In the Python version, I used TBB/OMP threading layers and some optimization to speed up the…

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## [Compilation of a function with constant arguments](https://discourse.julialang.org/t/compilation-of-a-function-with-constant-arguments/105168)

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**Author:** [@vvbond](https://discourse.julialang.org/u/vvbond)\
**Replies:** 1\
**Last updated:** [October 19, 2023, 11:45am UTC](https://discourse.julialang.org/t/compilation-of-a-function-with-constant-arguments/105168 "2023-10-19T11:45:30Z")

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I struggle to understand the following behaviour of Julia’s compilation process: according to the @time output, the sum of squares function defined below is not compiled when called with a constant argument. I wonder wh…

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## [JIT issues relevant to realtime applications](https://discourse.julialang.org/t/jit-issues-relevant-to-realtime-applications/67736)

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**Author:** [@solaris](https://discourse.julialang.org/u/solaris)\
**Replies:** 59\
**Last updated:** [July 29, 2023, 12:58pm UTC](https://discourse.julialang.org/t/jit-issues-relevant-to-realtime-applications/67736 "2023-07-29T12:58:06Z")

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First off, Julia’s performance (once JIT compiled) is insane! How?! (rhetorical). In my gaming development environment my naïve Julia code beats my naïve C++ code (clang O2 Release version). JIT is super useful for de…

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## [Julia precompilation limits or are there really any?](https://discourse.julialang.org/t/julia-precompilation-limits-or-are-there-really-any/55224)

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**Author:** [@Marcell\_Havlik](https://discourse.julialang.org/u/Marcell_Havlik)\
**Replies:** 20\
**Last updated:** [June 20, 2022, 1:19pm UTC](https://discourse.julialang.org/t/julia-precompilation-limits-or-are-there-really-any/55224 "2022-06-20T13:19:17Z")

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Hey, I tried to read every details on this topic but I still can’t be sure about what is the limiting factor at reaching “nocompilation” speed. (Under no compilation speed I mean the speed when you second time run the a…

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## [AoT / JIT and runtime constant folding](https://discourse.julialang.org/t/aot-jit-and-runtime-constant-folding/77226)

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**Author:** [@yarnton](https://discourse.julialang.org/u/yarnton)\
**Replies:** 4\
**Last updated:** [March 2, 2022, 8:23am UTC](https://discourse.julialang.org/t/aot-jit-and-runtime-constant-folding/77226 "2022-03-02T08:23:49Z")

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I have no understanding at all of Julia’s internals, and I was wondering how much constant folding the current compiler is able to do at runtime? Basically, I am facing a case which I believe is pretty common and I was …

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## [How can I speed up script overhead time?](https://discourse.julialang.org/t/how-can-i-speed-up-script-overhead-time/67676)

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**Author:** [@solaris](https://discourse.julialang.org/u/solaris)\
**Replies:** 5\
**Last updated:** [September 4, 2021, 5:49pm UTC](https://discourse.julialang.org/t/how-can-i-speed-up-script-overhead-time/67676 "2021-09-04T17:49:26Z")

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It seems like there’s overhead running Julia scripts that seem unreasonable and maybe I’m doing something wrong or missing a step. For example, I ran the nbody benchmark on my machine and gave it a few numbers. nbody ba…

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## [RFC: Just In Time Compilation PoC promising 10x dynamic dispatch performance](https://discourse.julialang.org/t/rfc-just-in-time-compilation-poc-promising-10x-dynamic-dispatch-performance/47341)

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**Author:** [@tisztamo](https://discourse.julialang.org/u/tisztamo)\
**Replies:** 0\
**Last updated:** [September 26, 2020, 10:33pm UTC](https://discourse.julialang.org/t/rfc-just-in-time-compilation-poc-promising-10x-dynamic-dispatch-performance/47341 "2020-09-26T22:33:08Z")

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edit: There is the fresh new ManualDispatch.jl, a simple manual implementation of the same idea by @jlapeyre This started as a simple benchmark to better understand the performance characteristics of dynamic dispatch, b…

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## [\[ANN\] Catwalk.jl - With dynamic dispatch to the moon! (an adaptive optimizer, aka JIT compiler)](https://discourse.julialang.org/t/ann-catwalk-jl-with-dynamic-dispatch-to-the-moon-an-adaptive-optimizer-aka-jit-compiler/57917)

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**Author:** [@tisztamo](https://discourse.julialang.org/u/tisztamo)\
**Replies:** 14\
**Last updated:** [June 2, 2021, 8:26pm UTC](https://discourse.julialang.org/t/ann-catwalk-jl-with-dynamic-dispatch-to-the-moon-an-adaptive-optimizer-aka-jit-compiler/57917 "2021-06-02T20:26:18Z")

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I ended up implementing one of my pipe dreams, and hey, it works! :smiley: Catwalk.jl Intro Catwalk.jl can speed up long-running Julia processes by minimizing the overhead of dynamic dispatch. It is a JIT compiler that…

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## [So does Julia compile or interpret?](https://discourse.julialang.org/t/so-does-julia-compile-or-interpret/56073)

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**Author:** [@xyz1](https://discourse.julialang.org/u/xyz1)\
**Replies:** 1\
**Last updated:** [February 26, 2021, 10:57am UTC](https://discourse.julialang.org/t/so-does-julia-compile-or-interpret/56073 "2021-02-26T10:57:35Z")

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Hi, I’ve been searching for this but I’m not sure there is a definitive answer written somewhere. I understand it may be an “implementation detail” and that “julia compiles to efficient native code for multiple platforms…