Adjust problem sizes for macro benchmarks

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Reduce the runtimes of warmup benchmarks

Signed-off-by: Stefan Marr <git@stefan-marr.de>
Increase runtime of peak performance benchmarks

to hopefully reduce mearument errors a little

Signed-off-by: Stefan Marr <git@stefan-marr.de>