-
Reference implementation (« gdal ») : gdal git commit b417a2ed57c5f4
-
Compared implementations
- « mine » : oslandia
-
Rasters :
- SRTM_36_03.tif
- SRTM_36_04.tif
- SRTM_37_03.tif
Command :
gdal_contour -i 10 raster.tif out.shp
| time(mine) | mem(mine) | count(mine) | time(gdal) | mem(gdal) | count(gdal) | |
|---|---|---|---|---|---|---|
| SRTM_36_03 | 6.5s | 91MB | 128630 | 24s | 88MB | 128529 |
| SRTM_36_04 | 38s | 320MB | 384139 | 146s | 274MB | 384121 |
| SRTM_37_03 | 19.5s | 443MB | 343151 | 100s | 367MB | 343143 |
The new implementation is way faster than the initial one. About 3 times faster, and up to 5 times in certain cases. However, it demands a little bit more RAM (up to about 20% more). The new implementation generates a similar amount of features (less than 0.1% of difference).
Mine
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Command: /home/hme/src/gdal_gh/gdal/apps/.libs/gdal_contour -i 10 /data/gis/srtm/srtm_36_03.tif /data/gis/srtm/out_mine.shp
Massif arguments: (none)
ms_print arguments: massif.out.13054
--------------------------------------------------------------------------------
MB
90.85^ #
| #
| @ #
| @@@ @:: :#
| @ @ :::@: ::#
| @ @ :::::: @: :::#
| : @@ ::::::@:: @ :::: :: @: :::#
| :::::@ :: :: :@: ::: :: ::::@ :::: :: @: :::#
| @: :::@ :: :: :@: :: :: :: : @ :@:::: :: @: :::#
| @@: :::@ :: :: :@: :: :: :: : @ ::@:::: :: @: :::#
| @@: :::@ :: :: :@: :: :: :: : @ :: :::::@:::: :: @: :::#
| @@@: :::@ :: :: :@: :: :: :: : @ ::::: ::@:::: :: @: :::#
| :::@@@: :::@ :: :: :@: :: :: :: : @ ::::: ::@:::: :: @: :::#
| @@:: @@@: :::@ :: :: :@: :: :: :: : @ ::::: ::@:::: :: @: :::#
| @ :: @@@: :::@ :: :: :@: :: :: :: : @ ::::: ::@:::: :: @: :::#
| ::@ :: @@@: :::@ :: :: :@: :: :: :: : @ ::::: ::@:::: :: @: :::#
| @: @ :: @@@: :::@ :: :: :@: :: :: :: : @ ::::: ::@:::: :: @: :::#
| :@: @ :: @@@: :::@ :: :: :@: :: :: :: : @ ::::: ::@:::: :: @: :::#
| ::::@: @ :: @@@: :::@ :: :: :@: :: :: :: : @ ::::: ::@:::: :: @: :::#
| @: ::@: @ :: @@@: :::@ :: :: :@: :: :: :: : @ ::::: ::@:::: :: @: :::#
0 +----------------------------------------------------------------------->Gi
0 18.56
GDAL
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Command: gdal_contour -i 10 /data/gis/srtm/srtm_36_03.tif /data/gis/srtm/out_gdal.shp
Massif arguments: (none)
ms_print arguments: massif.out.13275
--------------------------------------------------------------------------------
MB
88.09^ #
| #
| @@ #
| @@ :#
| @::@@::#
| @ ::@@: @@::#
| : @ :::: :: @@: @@::#
| ::::@@@::::::::: :@:: : : : ::: @@: @@::#
| ::: ::@ @: : :: :: :@: ::::::::::@@::: @@::: @@: @@::#
| @: : ::@ @: : :: :: :@: : :: :::::@ :::: :@ ::: @@: @@::#
| @@@: : ::@ @: : :: :: :@: : :: :::::@ :::::::::@ ::: @@: @@::#
| @@@ @: : ::@ @: : :: :: :@: : :: :::::@ ::::: :::@ ::: @@: @@::#
| ::@ @ @: : ::@ @: : :: :: :@: : :: :::::@ ::::: :::@ ::: @@: @@::#
| ::@ @ @: : ::@ @: : :: :: :@: : :: :::::@ ::::: :::@ ::: @@: @@::#
| :::@ @ @: : ::@ @: : :: :: :@: : :: :::::@ ::::: :::@ ::: @@: @@::#
| :::::@ @ @: : ::@ @: : :: :: :@: : :: :::::@ ::::: :::@ ::: @@: @@::#
| @: :::@ @ @: : ::@ @: : :: :: :@: : :: :::::@ ::::: :::@ ::: @@: @@::#
| :@: :::@ @ @: : ::@ @: : :: :: :@: : :: :::::@ ::::: :::@ ::: @@: @@::#
| :@: :::@ @ @: : ::@ @: : :: :: :@: : :: :::::@ ::::: :::@ ::: @@: @@::#
| :@: :::@ @ @: : ::@ @: : :: :: :@: : :: :::::@ ::::: :::@ ::: @@: @@::#
0 +----------------------------------------------------------------------->Gi
0 103.3