Shawn Walker wrote:
Danek Duvall wrote:
- Is signing really that much of a problem, performance-wise? Is it
just
the setting of sort_keys in the JSON dumper? We're eventually
going to
do be doing it on all of our own catalogs, so optimizing for when
it's
not there doesn't seem especially useful in the long run.
There seemed little point to signing the image catalogs or transformed
v0 catalogs.
So, to quanitfy this, it saves between 2-5 seconds on my x86 system to
not sign the files and about the same on SPARC (cuphead.sfbay).
This isn't surprising as, internally, simplejson has C python extensions
that are only used when sort_keys=False. To ensure a consistent
signature, I have to use sort_keys=True.
If you think this is relatively small gain for the possible benefit of
being able to verify whether the *image* catalog files have been
corrupted or changed since they were last written, I'm willing to undo
all of the sign=... changes since it's not a huge win.
Cheers,
--
Shawn Walker
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