On Jun 22, 3:04 pm, Evan Jones <ev...@mit.edu> wrote: > On Jun 22, 2010, at 15:35 , sheila miguez wrote: > > > I've got a servlet filter which wraps the HttpServletResponse. So, the > > servlet response's output stream, which is wrapped in a stream from > > the lzo library, is compressing data as it is getting written to. > > Ah, so the best case is probably message.writeTo(servletOutputStream) > If you are writing multiple messages, you'll probably want to > explicitly create a single CodedOutputStream to write all of them. > > If you experiment with this and find something different, I would be > interested to know. > > Evan > > -- > Evan Joneshttp://evanjones.ca/
Evan, thatnks for the great tip about using CodedOutputStream for the writing of protobuf into a compressible stream. When calling a .toByteArray() method and then writing it to a CompressionOutputStream, it takes 396,078,181 ns to compress 112,178 bytes. When I use .writeTo(...) and pass it a CompressionOutputStream as an input, it takes only 38,226,661 ns to compress 112,178 bytes. So its almost a 10x reduction, which is GREAT!!! Now I'm trying to figure out how I can speed up the decompression on the receiving side. What I have right now is: * Take the CompressionInputStream, convert it into a byte[] * Take the resulting byte[] and do .parseFrom(byte[]) This seems to be a faster route, then just doing .parseFrom(CompressionInputStream). 10,404 bytes of compressed payload takes 181,643,533 ns to decompress and convert into a proto message using .parseFrom(CompressionInputStream). 10,404 bytes of compressed payload takes only 155,264,303 ns, when first I create a byte[] and then pass it into .parseFrom(byte[]) on the message. Any thoughts on how this can be (if possible at all) made even faster?! :) Thanks, Alex -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To post to this group, send email to proto...@googlegroups.com. To unsubscribe from this group, send email to protobuf+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/protobuf?hl=en.
