pyhl: default surrogate process pool to 1 for library callers - #22
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Move the HYPERLIGHT_INITIAL_SURROGATES=1 default from the CLI binary into the pyhl library so Rust callers of pyhl::install / Runtime::new also avoid the ~3.5s startup cost of pre-spawning 512 surrogate processes on Windows. Callers can still override via the env var. Signed-off-by: danbugs <danilochiarlone@gmail.com>
danbugs
enabled auto-merge
May 13, 2026 21:33
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Linux Benchmarks
Details
| Benchmark suite | Current: 7fc0741 | Previous: 094c5cf | Ratio |
|---|---|---|---|
hello_world (median) |
10 ms |
10 ms |
1 |
pandas (median) |
80 ms |
80 ms |
1 |
density (per VM) |
7 MB |
7 MB |
1 |
snapshot (disk) |
384 MiB |
385 MiB |
1.00 |
This comment was automatically generated by workflow using github-action-benchmark.
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Windows Benchmarks
Details
| Benchmark suite | Current: 7fc0741 | Previous: 094c5cf | Ratio |
|---|---|---|---|
hello_world (median) |
1005 ms |
248 ms |
4.05 |
pandas (median) |
1678 ms |
757 ms |
2.22 |
density (per VM) |
6 MB |
6 MB |
1 |
snapshot (disk) |
392 MiB |
392 MiB |
1 |
This comment was automatically generated by workflow using github-action-benchmark.
This was referenced May 13, 2026
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Summary
HYPERLIGHT_INITIAL_SURROGATES=1default from the pyhl CLI binary into thepyhllibrary module so Rust callers ofpyhl::install/Runtime::newalso avoid the ~3.5s startup cost of pre-spawning 512 surrogate processes on Windows.bin/pyhl.rs.