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copies-rust: send PyBytes values back be dropped ino the parent thread...
copies-rust: send PyBytes values back be dropped ino the parent thread … instead of acquiring the GIL in the Rust thread in the Drop impl This commit is based on the premise that crossbeam-channel with unbounded send and non-blocking receive is faster than a contended GIL, but that remains to be measured. Differential Revision: https://phab.mercurial-scm.org/D9686
Gregory Szorc - - Load All Authors

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config
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/ rust / hgcli / .cargo / config
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# By default Rust will not export dynamic symbols from built executables.
# Python symbols need to be exported from executables in order for that
# executable to load Python extension modules, which are shared libraries.
# Otherwise, the extension module / shared library is unable to resolve
# Python symbols. This file contains target-specific configuration
# overrides to export dynamic symbols from executables.
#
# Ideally we would achieve this functionality via the build.rs build
# script. But custom compiler flags via build scripts apparently only
# support limited options.
[target.x86_64-unknown-linux-gnu]
rustflags = ["-C", "link-args=-Wl,-export-dynamic"]