[gnutls-devel] GnuTLS | WIP: Compare DNs by comparing their string representations (!1223)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Fri Mar 27 09:07:13 CET 2020

Pierre Ossman (Work account) commented on a discussion: https://gitlab.com/gnutls/gnutls/-/merge_requests/1223#note_312516311

Alright, so some testing by changing the test to loop 10000 times and running it through `perf`:

a) Old code:
 * 3.9 seconds runtime
 * 0.06% spent in `_gnutls_x509_compare_raw_dn()`

b) Current suggestion:
 * 5.1 seconds runtime (30% worse)
 * 22% spent in `_gnutls_x509_compare_raw_dn()`

c) Doing binary comparison before string comparison:
 * 4.2 seconds runtime (8% worse)
 * 7.4% spent in `_gnutls_x509_compare_raw_dn()`

So is c) good enough?

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