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f3337db614
This reduces peak memory on my test case from 1960.14MB to 1700.63MB (-260MB, -13.2%) with no measurable impact on CPU time. I'm currently working with a publics stream that is about 277MB. Before this change, we would allocate 277MB of heap memory, serialize publics into them, hold onto that heap memory, open the PDB, and commit into it. After this change, we defer the serialization until commit time. In the last change I made to public writing, I re-sorted the list of publics multiple times in place to avoid allocating new temporary data structures. Deferring serialization until later requires that we don't reorder the publics. Instead of sorting the publics, I partially construct the hash table data structures, store a publics index in them, and then sort the hash table data structures. Later, I replace the index with the symbol record offset. This change also addresses a FIXME and moves the list of global and public records from GSIHashStreamBuilder to GSIStreamBuilder. Now that publics aren't being serialized, it makes even less sense to store them as a list of CVSymbol records. The hash table used to deduplicate globals is moved as well, since that is specific to globals, and not publics. Reviewed By: aganea, hans Differential Revision: https://reviews.llvm.org/D81296 |
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| DIContext.h | ||