Build julia 1.12 with no GPL libraries #59701
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Revived version of #48244, with a slightly different approach. This version looks for a function pointer called `jl_image_unpack` inside compiled system images and invokes it to get the `jl_image_buf_t` struct. Two implementations, `jl_image_unpack_zstd` and `jl_image_unpack_uncomp` are provided (for comparison). The zstd compression is applied only to the heap image, and not the compiled code, since that can be shared across Julia processes. TODO: test a few different compression settings and enable by default. Example data from un-trimmed juliac "hello world": ``` 156M hello-uncomp 43M hello-zstd 48M hello-zstd-1 45M hello-zstd-5 43M hello-zstd-15 39M hello-zstd-22 $ hyperfine -w3 ./hello-uncomp Benchmark 1: ./hello-uncomp Time (mean ± σ): 74.4 ms ± 0.8 ms [User: 51.9 ms, System: 19.0 ms] Range (min … max): 73.0 ms … 76.6 ms 39 runs $ hyperfine -w3 ./hello-zstd-1 Benchmark 1: ./hello-zstd-1 Time (mean ± σ): 152.4 ms ± 0.5 ms [User: 138.2 ms, System: 12.0 ms] Range (min … max): 151.4 ms … 153.2 ms 19 runs $ hyperfine -w3 ./hello-zstd-5 Benchmark 1: ./hello-zstd-5 Time (mean ± σ): 154.3 ms ± 0.5 ms [User: 139.6 ms, System: 12.4 ms] Range (min … max): 153.5 ms … 155.2 ms 19 runs $ hyperfine -w3 ./hello-zstd-15 Benchmark 1: ./hello-zstd-15 Time (mean ± σ): 135.9 ms ± 0.5 ms [User: 121.6 ms, System: 12.0 ms] Range (min … max): 135.1 ms … 136.5 ms 21 runs $ hyperfine -w3 ./hello-zstd-22 Benchmark 1: ./hello-zstd-22 Time (mean ± σ): 149.0 ms ± 0.6 ms [User: 134.7 ms, System: 12.1 ms] Range (min … max): 147.7 ms … 150.4 ms 19 runs ``` --------- Co-authored-by: Gabriel Baraldi <[email protected]>
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This is mostly because CI can build these better than I can :)