On Mon, Sep 8, 2014 at 9:32 AM, hyaticua <corey.wil...@motionreality.com> 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 protobuf+unsubscr...@googlegroups.com. > To post to this group, send email to protobuf@googlegroups.com. > 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 protobuf+unsubscr...@googlegroups.com. To post to this group, send email to protobuf@googlegroups.com. Visit this group at http://groups.google.com/group/protobuf. For more options, visit https://groups.google.com/d/optout.
