Re: [netcdf-java] performance issue

• To: John Caron <caron@xxxxxxxxxxxxxxxx>
• Subject: Re: [netcdf-java] performance issue
• From: Mark Balonkin <mbalonkin@xxxxxxx>
• Date: Thu, 11 Dec 2008 17:20:45 +0100

Yes, I run several tests on large files and it's very clear that the difference 
in speed is a huge.
For instance writing a 100Mb file using 1mb buffer (i.e. writing an array of 
250000 float variables) cost:
- aprox. 10 sec. on .Net Wrapper on "C" library 3.6.1
- aprox  5-6 min. on Java NetCDF 2.2.20



-----Original Message-----
From: John Caron [mailto:caron@xxxxxxxxxxxxxxxx]
Sent: 11 декабря 2008 г. 16:45
To: Mark Balonkin
Cc: netcdf-java@xxxxxxxxxxxxxxxx
Subject: Re: [netcdf-java] performance issue



>
> Java code is approximately 40 times slower.

are you sure you are doing the timings correctly? 40x is more like
the difference between interpreted and compiled Java. Are you
warming up the JVM?

• References:
  • [netcdf-java] performance issue
    • From: Mark Balonkin
  • Re: [netcdf-java] performance issue
    • From: John Caron