a2800276 / benchmark

polyglottal, simple benchmark code

Mini Benchmark for C

This is a trivial port of the Go benchmark functionality to C (as well as Java and Javascript). This has been laying around in may toolbox for a while, I've checked through the C code and it suffered a little from bitrot. I've not checked the Java an Javscript versions, so proceed with caution.

Using

You can run a simple malloc vs. realloc benchmark using:

	$ ${CC} -DMAIN benchmark.c && ./a.out

Check the source or the Go documentation for more discussion about usage. In short, you need to provide a benchmark struct containing a benchmark function. The library sets the n member of the struct and calls the benchmark function which is expected to run the code you are benchmarking n times.

Declaring a benchmark is simple:

void bench (B * b) {
  for (i=0; i!=b->n; ++i) {
  	// benchmark goes here
  }
}

...

void main(void) {
	
  B b;
  b.name = "my name";
  b.benchmark = &bench;
  run(&b);
}

in case you care to measure throughput, use set_bytes to indicate the number of data is processed in each iteration. In case a substantial setup time is required before the actual benchmark loop, you can reset the timer using reset_time(B*b)