Created
May 12, 2016 01:05
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| vmware@vmware-virtual-machine:~/test$ cat inc-sub.cc | |
| bool foo(int i) { | |
| return i != 1000000000; | |
| } | |
| vmware@vmware-virtual-machine:~/test$ cat inc.cc | |
| bool foo(int); | |
| int main() { | |
| int i = 0; | |
| while (foo(++i)); | |
| return 0; | |
| } | |
| vmware@vmware-virtual-machine:~/test$ clang inc.cc inc-sub.cc -o inc -O0 | |
| vmware@vmware-virtual-machine:~/test$ time ./inc | |
| real 0m2.907s | |
| user 0m2.904s | |
| sys 0m0.000s | |
| vmware@vmware-virtual-machine:~/test$ sed -i inc.cc -e 's/++i/i++/' | |
| vmware@vmware-virtual-machine:~/test$ cat inc.cc | |
| bool foo(int); | |
| int main() { | |
| int i = 0; | |
| while (foo(i++)); | |
| return 0; | |
| } | |
| vmware@vmware-virtual-machine:~/test$ clang inc.cc inc-sub.cc -o inc -O0 | |
| vmware@vmware-virtual-machine:~/test$ time ./inc | |
| real 0m3.374s | |
| user 0m3.370s | |
| sys 0m0.000s | |
| vmware@vmware-virtual-machine:~/test$ clang inc.cc inc-sub.cc -o inc -O3 | |
| vmware@vmware-virtual-machine:~/test$ time ./inc | |
| real 0m1.924s | |
| user 0m1.918s | |
| sys 0m0.004s | |
| vmware@vmware-virtual-machine:~/test$ sed -i inc.cc -e 's/i++/++i/' | |
| vmware@vmware-virtual-machine:~/test$ cat inc.cc | |
| bool foo(int); | |
| int main() { | |
| int i = 0; | |
| while (foo(++i)); | |
| return 0; | |
| } | |
| vmware@vmware-virtual-machine:~/test$ clang inc.cc inc-sub.cc -o inc -O3 | |
| vmware@vmware-virtual-machine:~/test$ time ./inc | |
| real 0m1.835s | |
| user 0m1.833s | |
| sys 0m0.000s |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| vmware@vmware-virtual-machine:~/test$ cat inc-sub.cc | |
| bool foo(int i) { | |
| return i != 1000000000; | |
| } | |
| vmware@vmware-virtual-machine:~/test$ cat inc.cc | |
| bool foo(int); | |
| int main() { | |
| int i = 0; | |
| while (foo(++i)); | |
| return 0; | |
| } | |
| vmware@vmware-virtual-machine:~/test$ gcc inc.cc inc-sub.cc -o inc -O0 | |
| vmware@vmware-virtual-machine:~/test$ time ./inc | |
| real 0m2.973s | |
| user 0m2.970s | |
| sys 0m0.000s | |
| vmware@vmware-virtual-machine:~/test$ sed -i inc.cc -e 's/++i/i++/' | |
| vmware@vmware-virtual-machine:~/test$ cat ./inc.cc | |
| bool foo(int); | |
| int main() { | |
| int i = 0; | |
| while (foo(i++)); | |
| return 0; | |
| } | |
| vmware@vmware-virtual-machine:~/test$ gcc inc.cc inc-sub.cc -o inc -O0 | |
| vmware@vmware-virtual-machine:~/test$ time ./inc | |
| real 0m2.791s | |
| user 0m2.783s | |
| sys 0m0.004s | |
| vmware@vmware-virtual-machine:~/test$ gcc inc.cc inc-sub.cc -o inc -O3 | |
| vmware@vmware-virtual-machine:~/test$ time ./inc | |
| real 0m1.951s | |
| user 0m1.949s | |
| sys 0m0.005s | |
| vmware@vmware-virtual-machine:~/test$ sed -i inc.cc -e 's/i++/++i/' | |
| vmware@vmware-virtual-machine:~/test$ cat inc.cc | |
| bool foo(int); | |
| int main() { | |
| int i = 0; | |
| while (foo(++i)); | |
| return 0; | |
| } | |
| vmware@vmware-virtual-machine:~/test$ gcc inc.cc inc-sub.cc -o inc -O3 | |
| vmware@vmware-virtual-machine:~/test$ time ./inc | |
| real 0m1.808s | |
| user 0m1.802s | |
| sys 0m0.008s |
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