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demandimport: make module ignores a set (API)...
demandimport: make module ignores a set (API) The list of modules to ignore is used for membership testing. Yet it is defined as a list. Sets are more efficient for membership testing. So this commit converts the module list to a set. Since we took an API hit, I renamed the variable to further clarify the change. This appears to reduce the CPU time for running 300 invocations of `hg log -r. -T '{rev}'` on my i7-6700K: before: 18.64s after: 18.44s Differential Revision: https://phab.mercurial-scm.org/D3440
Gregory Szorc -
r37862:670eb4fa default
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/ mercurial / thirdparty / cbor
cbor2
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This library provides encoding and decoding for the Concise Binary Object Representation (CBOR) (RFC 7049) serialization format.

There exists another Python CBOR implementation (cbor) which is faster on CPython due to its C extensions. On PyPy, cbor2 and cbor are almost identical in performance. The other implementation also lacks documentation and a comprehensive test suite, does not support most standard extension tags and is known to crash (segfault) when passed a cyclic structure (say, a list containing itself).