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# Profiling
gperftools (formerly the Google profiler) is included in the .guix-dev
startup script. Compile gemma for profiling:
make clean
make profile
Run the profiler
env CPUPROFILE=/tmp/prof.out ./bin/gemma -g ./example/mouse_hs1940.geno.txt.gz -p ./example/mouse_hs1940.pheno.txt -gk -o mouse_hs1940
pprof ./bin/gemma /tmp/prof.out
and `top` shows
```
Welcome to pprof! For help, type 'help'.
(pprof) top
Total: 720 samples
103 14.3% 14.3% 103 14.3% dgemm_kernel_ZEN
39 5.4% 19.7% 79 11.0% ____strtod_l_internal
37 5.1% 24.9% 53 7.4% __printf_fp_l
36 5.0% 29.9% 36 5.0% __sched_yield
34 4.7% 34.6% 34 4.7% __strlen_avx2
31 4.3% 38.9% 31 4.3% __strspn_sse42
26 3.6% 42.5% 116 16.1% ReadFile_geno
25 3.5% 46.0% 26 3.6% _int_malloc
23 3.2% 49.2% 23 3.2% gsl_vector_set
18 2.5% 51.7% 18 2.5% __strcspn_sse42
```
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