-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
> > Note I am after the FASTEST way to do this in Java (and/or Scala). > Is it better to use the stream based classes, or is it better to > do direct array accesses and do bit shift operations and masks > with 0xff etc (to strip sign extension Java will do otherwise)? I > suspect the stream based approaches would be slower. I think you have to try and measure. I've faced the same problem with image decoding. The ImageI/O API contains an ImageInputStream which is supposed to have some optimizations - even for bitwise, not only bytewise operations. When I first worked on it a few years ago, I found that writing some specific classes for specific cases (e.g. reading 12 or 16 bits) was faster - in other words, the library didn't provide the faster code. A few time later, I discovered that some newer JRE was better and dropped some of my code because it was useless. So, it's a matter of trying, measuring and re-measuring for each JRE update. - -- Fabrizio Giudici - Java Architect, Project Manager Tidalwave s.a.s. - "We make Java work. Everywhere." java.net/blog/fabriziogiudici - www.tidalwave.it/people [email protected] -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.14 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkxHTLUACgkQeDweFqgUGxcwxACeLpaYIPiaCCWZe4Q+mSPl4P6x DMUAn2+o7vmQ32CxIcB+QobTB6Vov4ek =F5Co -----END PGP SIGNATURE----- -- You received this message because you are subscribed to the Google Groups "The Java Posse" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/javaposse?hl=en.
