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facebookincubator / fizz

C++14 implementation of the TLS-1.3 standard
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Build performance #47

Closed keksipurkki closed 4 years ago

keksipurkki commented 4 years ago

Summary:

Modify mac-build.sh to run make with -j$NCPU flag, where $NCPU is the number of cores as reported by macOS.

The speed-up was measured to be x2 on Dual-Core Intel Core i5.

Details:

Here are the measured times as reported by the time utility: 

parallel: sh mac-build.sh  1365.78s user 77.17s system 274% cpu 8:46.22 total
vanilla: sh mac-build.sh  900.69s user 54.79s system 90% cpu 17:34.50 total

And here is the output of system_profiler SPHardwareDataType:

Hardware:

    Hardware Overview:

      Model Name: iMac
      Model Identifier: iMac18,1
      Processor Name: Dual-Core Intel Core i5
      Processor Speed: 2,3 GHz
      Number of Processors: 1
      Total Number of Cores: 2
      L2 Cache (per Core): 256 KB
      L3 Cache: 4 MB
      Hyper-Threading Technology: Enabled
      Memory: 8 GB
      Boot ROM Version: 180.0.0.0.0
      SMC Version (system): 2.39f40
      Serial Number (system): ?
      Hardware UUID: ?
keksipurkki commented 4 years ago

Merged to master