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As proposed in: https://discourse.llvm.org/t/improving-the-reproducibility-of-linker-benchmarking/86057 This is a Nix recipe for collecting reproducers for benchmarking purposes in a reproducible way. It works by injecting a linker wrapper that embeds a reproducer tarball into a non-allocated section of every linked object, which generally causes them to be smuggled out of the build tree in a section of the final binaries. It may be used in conjunction with the script lld/utils/run_benchmark.py to measure the relative performance of linker changes or compare the performance of different linkers.
LLVM Linker (lld)
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.
Benchmarking
In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz
The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.