Optimization: createOperations(): avoid database lookups for CRS (typically PROJ strings) using unknown datums #4320
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…ically PROJ strings) using unknown datums Fixes OSGeo#4319 With that improvement, the runtime of the following snippet goes from 25.4 second to 0.9 second: ```c for(int i = 0; i < 2000; ++i) { PJ_CONTEXT *C = proj_context_create(); PJ *P = proj_create_crs_to_crs(C, "+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +no_defs", "+proj=utm +zone=31 +ellps=GRS80 +units=m +no_defs", NULL); proj_destroy(P); proj_context_destroy(C); } ```
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Nov 14, 2024
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Fixes #4319
With that improvement, the runtime of the following snippet goes from
25.4 second to 0.9 second: