Re: Fastest! Counting words (Mirek Fidler.. continues)

From:

ram@zedat.fu-berlin.de (Stefan Ram)

Newsgroups:

comp.lang.c++,comp.lang.java.programmer

Date:

9 Apr 2008 04:41:58 GMT

Message-ID:

<JVM-20080409062544@ram.dialup.fu-berlin.de>

"Chris Thomasson" <cristom@comcast.net> writes:

The JVM your using right now was "probably" created with C/C++,
and of course, assembly language.

  There actually are several JVMs written in Java.
  Some run on another JVM, some are being compiled
  to some other language.

So, C/C++ can be used to create a language that performs faster than itself?

  Late compiling can take advantage of its knowledge of the
  execution environment and processor. C++ usually is compiled
  early (before distribution).

  A Java optimizer also possibly might do more optimizations,
  because he can take more guarantees about the code for granted.

  If I understand this

http://shootout.alioth.debian.org/gp4/java.php

  right, Java (with the JVM, not JET) is sometimes
  ("spectral-norm", "sum-file") faster, and often not much
  slower (1.1-2.8) than C++.

  So, this performance price is not that high, but it buys
  developement simplifications by a garbage collector and a
  simpler language, more security by Array bound checks,
  portability of the class files including net access and a
  GUI and a lot of other nice features.

  A quotation from the site mentioned above:

      ?Benchmarking programming languages?

      How can we benchmark a programming language?
      We can't - we benchmark programming language implementations.

      How can we benchmark language implementations?
      We can't - we measure particular programs.?

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