Update: I added performance tests for ldc and gdc with the same programs. The results are interesting (please see the github page for the details).
regards christian On 8/26/11 19:43 , Christian Köstlin wrote:
Hi guys, i started the thread: http://stackoverflow.com/questions/7202710/fastest-way-of-reading-bytes-in-d2 on stackoverflow, because i ran into kind of a problem. i wanted to read data from a file (or even better from a stream, but lets stay with file), byte-by-byte. the whole thing was part of my protobuf implementation for d2, and there you have to look at each byte to read out the varints. i was very proud of my implementation until i benchmarked it first against java (ok ... i was a little slower than java) and then against c++ (ok ... this was a complete different game). after some optimizing i got better, but was still way slower than c++. so i started some small microbenchmarks regarding fileio: https://github.com/gizmomogwai/performance in c++, java and d2. could you help me improve on the d2 performance? i am sure, that i am missing something fundamental, because i thing it should be at least possible be equal or better than java. thanks in advance christian
