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| author | Michal Muskala <[email protected]> | 2017-07-01 17:19:52 +0200 |
|---|---|---|
| committer | Michal Muskala <[email protected]> | 2017-07-06 11:42:52 +0200 |
| commit | 245aa4ed9b41aa601784598b0b3286d29b6d0085 (patch) | |
| tree | de5448198979b0ccdc610883d4bcaafab326f0de /erts/emulator/beam/ops.tab | |
| parent | e8a2cae09282b25a8eda9b6f04876e23a854336b (diff) | |
| download | otp-245aa4ed9b41aa601784598b0b3286d29b6d0085.tar.gz otp-245aa4ed9b41aa601784598b0b3286d29b6d0085.tar.bz2 otp-245aa4ed9b41aa601784598b0b3286d29b6d0085.zip | |
Introduce new_small_map_lit op
Take advantage of the fact that small maps have a tuple for keys.
When new map is constructed and all keys are literals, we can construct
the entire keys tuple as a literal.
This should reduce the memory of maps created with literal keys almost by half,
since they all can share the same keys tuple.
Diffstat (limited to 'erts/emulator/beam/ops.tab')
| -rw-r--r-- | erts/emulator/beam/ops.tab | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab index 4ce86ce949..ed856b760b 100644 --- a/erts/emulator/beam/ops.tab +++ b/erts/emulator/beam/ops.tab @@ -1425,7 +1425,11 @@ sorted_put_map_exact F Src=s Dst Live Size Rest=* => \ sorted_put_map_exact F Src Dst Live Size Rest=* => \ move Src x | update_map_exact F x Dst Live Size Rest +new_map Dst Live Size Rest=* | is_small_map_literal_keys(Size, Rest) => \ + gen_new_small_map_lit(Dst, Live, Size, Rest) + new_map d I I +i_new_small_map_lit d I q update_map_assoc j s d I I update_map_exact j s d I I |