How to improve the python efficiency?

ZuoqiChen

i am using arcpy to process some raster data and output a raster.
but now, i meet some problems.
1. how to flush the memory of temporary data.
2. how can i set a temp path for the temporary data.
3. finanlly and biggest problem is when i output a raster, it taked a long time (e.g. output a 18MB data need more than 10 min)?

ZuoqiChen

It looks like it isn't the saving of the raster that is taking a long time, but the series of processes executed beforehand.  Can you post your entire script?

I use breakpoint to test the code.
There is not problems in the series of processes executed beforehand.
I can't give u my code, because of confidentiality agreement. But I can describe my code details.

#Create an empty Raster in Memory
myRaster = Raster(dsm_file)*0
for i in (0,10):
    #Execute HillShade
    #myHillShadePath is the output Path and file name for HillShade
    myHillShadePath = r"C:/data/hillshade_"+str(i)
    myHill = Execute_HillShade(myHillShadePath )
    myRaster = Execute_Raster(myHill ,myRaster )
    #clean up the HillShade
    arcpy.Delete_management(outHillShadeRaster)

#save the final raster
myRaster.save(path)

if i do not clean up the HillShade raster, which means i delete the  "arcpy.Delete_management(outHillShadeRaster)" ,  the program can be work.
if i clean up the HillShade raster, the program will be closed when the program going to output the final data.