Will Lillis ea90489d7a perf(generate): add CSR-compressed parse tables (ABI 16) ... Apply Compressed Sparse Row (CSR) compression to the parse table for grammars that benefit, replacing the original dense + small split with three flat arrays: uint32_t parse_table_row_offsets[STATE_COUNT + 1] uint16_t parse_table_columns[TOTAL_NNZ] uint16_t parse_table_values[TOTAL_NNZ] Heuristic for enabling CSR (per grammar, all three must hold): 1. LARGE_STATE_COUNT * SYMBOL_COUNT > STATE_COUNT * 40 Ensures the dense table is large enough relative to total state count that savings outweigh the small-state grouping penalty. 2. dense table density < 45% Ensures CSR actually saves space. Above ~50% density, CSR's per-entry column indices cost more than the zeros they eliminate. 45% adds margin below the theoretical crossover. 3. LARGE_STATE_COUNT * SYMBOL_COUNT > 50,000 Avoids applying a format change to tiny grammars where fixed overhead dominates. Co-authored-by: Tuomas Hietanen <thorium@iki.fi>		2026-05-19 17:57:49 -04:00
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api.h	perf(generate): add CSR-compressed parse tables (ABI 16)	2026-05-19 17:57:49 -04:00