.TH IM_BENCHMARK 3 "6 Oct 2006"
.SH NAME
im_benchmark \- do something complicated
.SH SYNOPSIS
.B #include <vips/vips.h>

int im_benchmark( IMAGE *in, IMAGE *out )

.SH DESCRIPTION
.B im_benchmark(3)
performs a complicated operation (based on a real example of VIPS usage) on a 
LABPACK image. It is useful for benchmarking the VIPS threading system. It 
should speed up (mostly) linearly with more CPUs.

.SH RETURNED VALUES
The function returns 0 on success and -1 on error.