[postgis-tickets] [PostGIS] #2878: winnie coughing up blood when trying to build cunit for twkb
PostGIS
trac at osgeo.org
Sun Aug 10 09:00:51 PDT 2014
#2878: winnie coughing up blood when trying to build cunit for twkb
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Reporter: robe | Owner: nicklas
Type: defect | Status: reopened
Priority: blocker | Milestone: PostGIS 2.2.0
Component: postgis | Version: trunk
Resolution: | Keywords:
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Comment(by nicklas):
Yes, I guess you are right.
The reason for moving the functions into the header file was that I saw a
performance regression when they were in a separate file compared to when
they were in the lwout_twkb.c file.
The timing on a known data set and query, went from in average about 2850
ms to above 3000 ms. I recompiled and tested back and forward a few times.
So it is about 5%.
When putting the functions into the header the timings was almost back
where we began.
But I think I will have to rewind to the version Sandro wrote with the
functions in a varint.c file and take the performance impact.
This is clearly a grey zone where the compilers doesn't fully agree. I
guess it can be some setting in the config file that gives this
difference?
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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2878#comment:14>
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