Performance issue on labeling

[Erki Veersalu]

Hi again,

I have made some more testing. I corrected my dataset, removed road segments 
without label and joinded ones with the same label.
If I map only road layer (2600 rows in DB) in defined place it's genereted:
without labels ->0,18 sec
with labels -> 0,54 sec
with outlined labels ->1,45 sec

Why takes outlined labeling 3 times more time than without outlines?
Could there be anything wrong in my MapServer installation?

Thank you in advance,
Erki Veersalu



On 6/6/05, Erki Veersalu <oraakel at gmail.com> wrote:
> Dear MapServer users,
> 
> I need help for improving speed of my web-application. I would really
> appreciate if someone could comment following issue.
> I'm using MapServer for displaying road network with labels over
> PostGis,Postgresql. Database is not that big, but making a GIF file of
> only roads (~200000 road segments) with angular true type labeling
> takes ~3 sec. If I don't use labeling it's 0,5 sec and with bitmap
> labels it's 0,6 sec
> Mapserver is running on Solaris 9.
> 
> Why is labeling so slow? What can I do to speed up generation of an image?
> 
> mapserv -v
> MapServer version 4.4.1 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP
> SUPPORTS=PROJ SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER INPUT=EPPL7
> INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE
> 
> map file:
> MAP
> NAME tuwa
> STATUS ON
> IMAGETYPE GIF
> SIZE 400 300
> EXTENT -876000 1330000 2230000 3650000
> SHAPEPATH "/usr/local/apache2/htdocs/mapserver/tuwa/data/"
> FONTSET "/usr/local/apache2/htdocs/mapserver/tuwa/data/fonts/fonts.list"
> UNITS METERS
> 
> WEB
> IMAGEPATH "/usr/local/apache2/htdocs/mapserver/tmp/"
> IMAGEURL "/mapserver/tmp/"
> END
> 
> SCALEBAR
> STATUS on
> INTERVALS 4
> SIZE 200 2
> COLOR 0 0 0
> OUTLINECOLOR 0 0 0
> UNITS kilometers
> LABEL
> COLOR 0 0 0
> SIZE small
> END
> END
> 
> LAYER
> NAME A40
> STATUS default
> CONNECTIONTYPE postgis
> CONNECTION "user=postgres dbname=tuwa"
> DATA "the_geom from streets"
> TYPE line
> LABELITEM "name"
> LABELMAXSCALE 45000
> CLASS
> SYMBOL 0
> COLOR 150 150 150
> MAXSCALE 50000
> LABEL
> TYPE TRUETYPE
> FONT "arial"
> SIZE 9
> MINSIZE 8
> MAXSIZE 10
> FORCE FALSE
> COLOR 0 0 0
> OUTLINECOLOR 255 255 255
> POSITION cc
> ANGLE auto
> ANTIALIAS TRUE
> MINFEATURESIZE 3
> MINDISTANCE 100
> PARTIALS TRUE
> END
> END
> END
> END
> 
> Erki Veersalu
> Estonia
>
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