howtos:toolcoding:performance_tuning
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howtos:toolcoding:performance_tuning [2011/06/22 21:00] chris.strashok |
howtos:toolcoding:performance_tuning [2011/06/22 21:01] (current) chris.strashok |
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| The input objects are A[a,b,c,d] and B[e,f,a,b]: | The input objects are A[a,b,c,d] and B[e,f,a,b]: | ||
| - | If the input objects are used as they are shown above, TOOL will bring in all of the elements contained in the dimensions a, b, c, d, e and f into memory. The memory requirement can be written as memory = extent(a) * extent(b) * extent(c) * extent(d) * extent(e) * extent(f). | + | If the input objects are used as they are shown above, TOOL will bring in all of the elements contained in the dimensions a, b, c, d, e and f into memory. The memory requirement can be written as memory = extent[a] * extent[b] * extent[c] * extent[d] * extent[e] * extent[f]. |
| - | However, if we reorder the dimensions of object B to look like B[a,b,e,f] then TOOL will bring in the all of the elements contained in the dimensions c, d, e and f into memory. The memory requirement can be written as memory = extent(c) * extent(d) * extent(e) * extent(f). This will be repeated x times where x = extent(a) * extent(b). | + | However, if we reorder the dimensions of object B to look like B[a,b,e,f] then TOOL will bring in the all of the elements contained in the dimensions c, d, e and f into memory. The memory requirement can be written as memory = extent[c] * extent[d] * extent[e] * extent[f]. This will be repeated x times where x = extent[a] * extent[b]. |
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| The input object is A[a,b] and the output object is B[c,d] | The input object is A[a,b] and the output object is B[c,d] | ||
| - | TOOL will bring in all of the elements contained in the dimensions a, b, c, and d into memory. The memory requirement can be written as memory = extent(a) * extent(b) * extent(c) * extent(d) | + | TOOL will bring in all of the elements contained in the dimensions a, b, c, and d into memory. The memory requirement can be written as memory = extent[a] * extent[b] * extent[c] * extent[d] |
howtos/toolcoding/performance_tuning.1308776423.txt.gz ยท Last modified: 2011/06/22 21:00 by chris.strashok
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