Fantastic. Thanks for the summary, Feng! - H
On Monday, September 8, 2014 5:24:05 PM UTC-4, Feng Xiao wrote: > > On Mon, Sep 8, 2014 at 9:32 AM, hyaticua <[email protected] > <javascript:>> wrote: > >> Reading the change log for 2.6.0, the C++ changes describe "Various >> speed optimizations". >> >> Does anyone know what kinds of optimizations were included in the release >> or what kind performance we should reasonably expect? I could not find >> anything in a naive google search. >> > The performance improvements we have made are small changes that optimize > very specific use cases/methods. For example, for the clear() method some > redundant operations has been collapsed into one (e.g., "has_bits &= ~0x1;" > and "has_bits &= ~0x2;" are merged into "has_bits = 0;"). The data members > of a generated class is also reordered to have the most-frequently accessed > members to appear early so they have smaller offsets. And a lot other such > kind of changes. For these specific cases we benchmarked (like the > performance of calling a clear() method repeatedly), the performance will > be improved by 1% to 3%. Overall though, I won't expect users to see > noticeable differences in their applications. > > For the parsing performance of protobufs, the numbers we have are around > ~500MB/s (i.e., parsing a 100-bytes message takes about 200 nano-seconds). > Serialization performance is on the same scale. Of course this result > depends on message definitions / data / platform, you'd better have your > own benchmarks for your own use case. I wound't expect the result to vary > too much though. > > >> >> >> Thanks, >> H >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Protocol Buffers" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> Visit this group at http://groups.google.com/group/protobuf. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/protobuf. For more options, visit https://groups.google.com/d/optout.
