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Random notes on compiler results in terms of runtime speed and library size
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#### Mapnik [2.1.x branch](https://github.com/mapnik/mapnik/commit/c6fd387469633ee7055aee606abb6f5d3d936a29) with clang++ `3.3 (trunk 177655)` on OS X 10.7
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- -Os: libmapnik.dylib is `16.2` MB and tests run in `3.9s`
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- -O2: libmapnik.dylib is `12.8` MB and tests run in `3.7s`
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- -O3: libmapnik.dylib is `12.5` MB and tests run in `3.7s`
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#### Mapnik 3.x
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OS X duel core: `2.8 GHz Intel Core i7`
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At https://github.com/mapnik/mapnik/commit/66ad95cbbe755c9e905406b6f1227b06b24f60e1
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```
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|
$ clang++ -v
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Apple LLVM version 6.1.0 (clang-602.0.49) (based on LLVM 3.6.0svn)
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Target: x86_64-apple-darwin14.3.0
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Thread model: posix
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```
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|
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|
```
|
|
|
|
$ source bootstrap.sh && time make
|
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|
|
real 16m31.347s
|
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|
user 29m1.430s
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sys 1m7.557s
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|
```
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|
rebuilding with ccache `v3.2.1` (first run):
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|
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|
```
|
|
|
|
$ ./configure CXX="/Users/dane/.homebrew/bin/ccache clang++"
|
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|
|
$ time make
|
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|
|
real 11m3.394s
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|
user 28m36.684s
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|
sys 1m36.502s
|
|
|
|
```
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|
Second run:
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|
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|
|
|
```
|
|
|
|
make clean
|
|
|
|
time make
|
|
|
|
real 0m41.734s
|
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|
|
user 0m41.007s
|
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|
|
sys 0m15.724s
|
|
|
|
``` |
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\ No newline at end of file |
