add precompilation statements to improve first-time-to-lower latency #14
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Exercises the complete lowering pipeline during precompilation with a sample code thunks to create method and type definitions. This precompilation is enabled by default but can be disabled by setting the `JULIA_LOWERING_PRECOMPILE` environment variable to false-cy, which may be useful during development. Ideally we'd like to use Preferences.jl for this configuration, but my understanding is that JuliaLowering aims to be self-contained and should not add dependencies other than JuliaSyntax.
aviatesk
added a commit
to aviatesk/JETLS.jl
that referenced
this pull request
Jun 14, 2025
Use the `aviatesk/JuliaLowering.jl#avi/JETLS` branch which combines the following JL branches: - [`mlechu:fix-nightly`](JuliaLang/JuliaLowering.jl#10) - [`aviatesk:avi/precompile`](JuliaLang/JuliaLowering.jl#14) This is a temporary solution until these branches are merged into JL#master. This enables JL precompilation and significantly improves JETLS startup time (even when JETLS `precompile_workload` is set to `false`).
aviatesk
added a commit
to aviatesk/JETLS.jl
that referenced
this pull request
Jun 14, 2025
Use the `aviatesk/JuliaLowering.jl#avi/JETLS` branch which combines the following JL branches: - [`mlechu:fix-nightly`](JuliaLang/JuliaLowering.jl#10) - [`aviatesk:avi/precompile`](JuliaLang/JuliaLowering.jl#14) This is a temporary solution until these branches are merged into JL#master. This enables JL precompilation and significantly improves JETLS startup time (even when JETLS `precompile_workload` is set to `false`).
Member
|
Looks good. Thanks for adding the option to turn it off as well :) We can only add dependencies (like Preferences.jl) if we have some plan to vendor them into the compiler when JuliaLowering becomes part of the core compiler code. So I agree it's best to avoid them for now if there's an easy alternative. |
adienes
pushed a commit
to adienes/julia
that referenced
this pull request
Nov 20, 2025
…uliaLang/JuliaLowering.jl#14) Exercises the complete lowering pipeline during precompilation with a sample code thunks to create method and type definitions. This precompilation is enabled by default but can be disabled by setting the `JULIA_LOWERING_PRECOMPILE` environment variable to false-cy, which may be useful during development. Ideally we'd like to use Preferences.jl for this configuration, but my understanding is that JuliaLowering aims to be self-contained and should not add dependencies other than JuliaSyntax.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Exercises the complete lowering pipeline during precompilation with a sample code thunks to create method and type definitions.
This precompilation is enabled by default but can be disabled by setting the
JULIA_LOWERING_PRECOMPILEenvironment variable to false-cy, which may be useful during development.Ideally we'd like to use Preferences.jl for this configuration, but my understanding is that JuliaLowering aims to be self-contained and should not add dependencies other than JuliaSyntax.