Dan Kenigsberg has submitted this change and it was merged.
Change subject: api: Speed up schema loading ......................................................................
api: Speed up schema loading
Use yaml.CLoader for 13x speedup in vdsm schema loading.
Here is a comparison with other formats:
$ python bench.py
yaml: 1.053720 seconds per load cyaml: 0.086472 seconds per load json: 0.049521 seconds per load pickle: 0.001516 seconds per load
$ python3 bench.py
yaml: 1.340607 seconds per load cyaml: 0.100010 seconds per load json: 0.026627 seconds per load pickle: 0.002153 seconds per load
$ grep 'model name' /proc/cpuinfo | head -n1 model name : Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz
Clearly the best format is pickle, 700X times faster on python 2 and 638X times faster on python 3. However loading the schema in 100 milliseconds seems to be good enough for now.
The benchmark script: https://bugzilla.redhat.com/attachment.cgi?id=1208141
Change-Id: I230fb88c279973f542f6e1cac17f43ff6f0d2f62 Bug-Url: https://bugzilla.redhat.com/1381899 Signed-off-by: Nir Soffer nsoffer@redhat.com Reviewed-on: https://gerrit.ovirt.org/65230 Reviewed-by: Simone Tiraboschi stirabos@redhat.com Continuous-Integration: Jenkins CI Reviewed-by: Piotr Kliczewski piotr.kliczewski@gmail.com Tested-by: Simone Tiraboschi stirabos@redhat.com --- M lib/api/vdsmapi.py 1 file changed, 1 insertion(+), 1 deletion(-)
Approvals: Piotr Kliczewski: Looks good to me, approved Nir Soffer: Verified Simone Tiraboschi: Verified; Looks good to me, but someone else must approve Jenkins CI: Passed CI tests