lazily allocate the threaded buffers and allocate them on the thread that will access it #704
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…that will access it
Codecov Report
@@ Coverage Diff @@
## master #704 +/- ##
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+ Coverage 75.24% 75.36% +0.11%
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Files 36 36
Lines 2347 2358 +11
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+ Hits 1766 1777 +11
Misses 581 581
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fredrikekre
approved these changes
Apr 30, 2021
quinnj
reviewed
Apr 30, 2021
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| function __init__() | ||
| Threads.resize_nthreads!(default_cookiejar) | ||
| resize!(empty!(default_cookiejar), Threads.nthreads()) |
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curious why the empty! call here?
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Just in case some garbage is left in it from the precompilation process that ends up getting serialized.
quinnj
approved these changes
Apr 30, 2021
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This package does quite a bit of work on load time since it allocates and compiles some regular expressions. That code needs to be inferred and run which causes some penalty to the load time of the package. In particular, the function
Threads.resize_nthreads!seems to be slow to infer (JuliaLang/julia#40630). In addition, it is generally better to allocate objects on the actual thread that they will be used. The pattern used in this PR is the same as the Random stdlib uses to allocate thread local RNGs: https://github.com/JuliaLang/julia/blob/e4fcdf5b04fd9751ce48b0afc700330475b42443/stdlib/Random/src/RNGs.jl#L369-L385.Together with JuliaWeb/URIs.jl#27 the timings for loading the package are:
Before:
After: