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Diffstat (limited to 'doc/man7/migration_guide.pod')
| -rw-r--r-- | doc/man7/migration_guide.pod | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/man7/migration_guide.pod b/doc/man7/migration_guide.pod index c1d47737c1..bad1eab873 100644 --- a/doc/man7/migration_guide.pod +++ b/doc/man7/migration_guide.pod @@ -209,6 +209,15 @@ All new applications should use the new L<EVP_MAC(3)> interface. See also L<OSSL_PROVIDER-default(7)/Message Authentication Code (MAC)> and L<OSSL_PROVIDER-FIPS(7)/Message Authentication Code (MAC)>. +=head4 Algorithm Fetching + +Using calls to convenience functions such as EVP_sha256() and EVP_aes_256_gcm() may +incur a performance penalty when using providers. +Retrieving algorithms from providers involves searching for an algorithm by name. +This is much slower than directly accessing a method table. +It is recommended to prefetch algorithms if an algorithm is used many times. +See L<crypto(7)/Performance>, L<crypto(7)/Explicit fetching> and L<crypto(7)/Implicit fetching>. + =head4 Support for Linux Kernel TLS In order to use KTLS, support for it must be compiled in using the |