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# Simple/stupid benchmarking
Compares the string builder and numberToString() function as provided by c++utilities
with std::stringstream (without reserving stringstream buffer).
The string builder is actually just a fancy syntax for std::string::reserve()
making its use more convenient.
## Compile and run
eg.
```
g++ -O3 stringbuilder-bench.cpp -o stringbuilder-bench-O3 -Wl,-rpath /lib/path -L /lib/path -lc++utilities
./stringbuilder-bench-O3
```
## Results on my machine
Results with -03:
```
plus operator: 00:00:19
stringstream: 00:00:16
string builder: 00:00:05
diff (stringstream minus string builder): 00:00:11
factor (stringstream / string builder): 3.2
```
However, with -O0 4 times *slower*:
```
plus operator: 00:00:34
stringstream: 00:00:23
string builder: 00:01:02
diff (stringstream minus string builder): - 00:35:31
factor (stringstream / string builder): 0.370968
```
Still 2.42 times faster than stringstream with -O2:
```
plus operator: 00:00:21
stringstream: 00:00:17
string builder: 00:00:07
diff (stringstream minus string builder): 00:00:10
factor (stringstream / string builder): 2.42857
```
So this basic tests show that string builder is up to 3 times faster when using full optimization
and still 2 times faster when using -O2 (default under Arch Linux). However, without optimization it way
slower. Results with clang++ were similar.
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