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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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# Rust builds with a modern MSVC and uses a newer CRT.
# Python 2.7 has a shared library dependency on an older CRT (msvcr90.dll).
# We statically link the modern CRT to avoid multiple msvcr*.dll libraries
# being loaded and Python possibly picking up symbols from the newer runtime
# (which would be loaded first).
[target.'cfg(target_os = "windows")']
rustflags = ["-Ctarget-feature=+crt-static"]