Il 13/05/2013 22:31, Anthony Liguori ha scritto: > This patch adds a small typename cache to ObjectClass. This allows > caching positive casts within each ObjectClass. Benchmarking a > PPC workload provided by Aurelien, this patch eliminates every > single g_hash_table_lookup() happening during the benchmark (which > was about 2 million per-second). > > With this patch applied, I get exactly the same performance (within > the margin of error) as with --disable-qom-cast-debug. > > N.B. it's safe to cache typenames only from the _assert() macros > because they are always called with string literals.
Nice! Perhaps (for 1.6?) we can cache other results than class, so that interfaces are sped up as well. Reviewed-by: Paolo Bonzini <pbonz...@redhat.com>
