================
@@ -942,20 +942,28 @@ CompressedOffloadBundle::compress(const
llvm::MemoryBuffer &Input,
Input.getBuffer().size());
llvm::compression::Format CompressionFormat;
+ int Level;
- if (llvm::compression::zstd::isAvailable())
+ if (llvm::compression::zstd::isAvailable()) {
CompressionFormat = llvm::compression::Format::Zstd;
- else if (llvm::compression::zlib::isAvailable())
+ // Use a high zstd compress level by default for better size reduction.
+ const int DefaultZstdLevel = 20;
----------------
Artem-B wrote:
> compiling kernels to bitcode for 6 GPU takes 30s. compression with zstd level
> 20 takes 2s.
This looks acceptable for me.
> unless zstd can be parallelized.
zstd does support multithreaded compression, but enabling it would run into the
same issue we had with enabling multi-threaded compilation -- it will interfere
with the build system's idea of resource usage.
https://github.com/llvm/llvm-project/pull/83605
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