gistfile1.txt

% diff ./modifiedbench.cpp ~/klauslerbench.cpp
8,10d7
< //
< // The linux common case does not have carriage returns
< // Define USE_NL or USE_CR
65d61
< #if USE_CR
67,71d62
< #elif USE_NL
<       src[j] = '\n';
< #else
<     #error "Plese define one of USE_NL or USE_CR"
< #endif

%sh -x do.sh

+ which clang++
/usr/bin/clang++

+ clang++ --version
Apple LLVM version 10.0.1 (clang-1001.0.46.4)
Target: x86_64-apple-darwin18.7.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

+ system_profiler SPHardwareDataType
Hardware:

    Hardware Overview:

      Model Name: Mac mini
      Model Identifier: Macmini8,1
      Processor Name: Intel Core i7
      Processor Speed: 3.2 GHz
      Number of Processors: 1
      Total Number of Cores: 6
      L2 Cache (per Core): 256 KB
      L3 Cache: 12 MB
      Hyper-Threading Technology: Enabled
      Memory: 32 GB
      Boot ROM Version: 220.270.99.0.0 (iBridge: 16.16.6571.0.0,0)
      Serial Number (system): C07XM92JJYW0
      Hardware UUID: 5FF7BA14-D935-5B33-AE1E-57A7B5A47D55

+ clang++ -O3 -std=c++11 ./modifiedbench.cpp -DREMOVE_CARRIAGE_RETURNS -DUSE_CR
+ ./a.out
996147

real    0m3.653s
user    0m3.649s
sys     0m0.003s
+ clang++ -O3 -std=c++11 ./modifiedbench.cpp -DREMOVE_IF -DUSE_CR
+ ./a.out
996147

real    0m3.143s
user    0m3.140s
sys     0m0.003s
+ clang++ -O3 -std=c++11 ./modifiedbench.cpp -DREMOVE_CARRIAGE_RETURNS -DUSE_NL
+ ./a.out
1048576

real    0m0.559s
user    0m0.556s
sys     0m0.003s
+ clang++ -O3 -std=c++11 ./modifiedbench.cpp -DREMOVE_IF -DUSE_NL
+ ./a.out
1048576

real    0m2.676s
user    0m2.673s
sys     0m0.003s