On Saturday, 13 August 2016 17:22:29 UTC+2, Peter Herth wrote: > > Having a parallel version of the raw converter could yield conversion > times far faster then the original C. And it would be a neat Go library to > have. >
For the biggest part, I would not expect you to be able to beat C code, for that there is too much pointer arithmetic going on. The forced bounds checks will probably eat around 20% of your speed. The Go 1.7 SSA compiler will however help bringing us to the 20% overhead. In terms of multithreading - only a few formats can be decoded multithreaded. Most formats are some sort of LJPEG, where every pixel depends on previous data - forcing you to do single threaded decoding. DNG being the only "big" exception. For uncompressed formats, you are just moving bits, so multithreading gives you little advantage. RawSpeed has multithreaded decoding of images where it is possible. /Klaus -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
