[Liblas-devel] Performance Comparison 1.21 C Api vs 1.6b3

[Mauricio Terneus]

Latest Checkout

Load Time for 9935230 points:

Copy 1: 1.96 seconds
Copy 2: 1.95 seconds
Copy 3: 1.96 seconds
Copy 4: 1.95 seconds
Copy 5: 2.00 seconds





-----Original Message-----
From: liblas-devel-bounces at lists.osgeo.org
[mailto:liblas-devel-bounces at lists.osgeo.org] On Behalf Of Mateusz Loskot
Sent: Wednesday, December 22, 2010 5:29 AM
To: liblas-devel at lists.osgeo.org
Subject: RE: [Liblas-devel] Performance Comparison 1.21 C Api vs 1.6b3


Hi,

Calculating average as representative of performance makes little sense.
There are no latencies involved like related to networking, just CPU and RAM
is used.
The best time is the final result.

Also, it's important to try to avoid disk cache influence, especially if the
same file
is read in number of iterations.
On Linux, it's easy to do, just drop all disk caches before reading LAS
file:
http://kernelnewbies.org/Linux_2_6_16
On Windows, ... make N copies of the same LAS file and read different copy
in each iteration.

Best regards,

-----
-- 
Mateusz Loskot
http://mateusz.loskot.net
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