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Redesign and harden string interning.

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Up to 40% faster on hash-intensive benchmarks.
With some ideas from Sokolov Yura.
This commit is contained in:
Mike Pall
2020-06-23 03:06:45 +02:00
parent a44f53acf5
commit ff34b48ddd
22 changed files with 394 additions and 202 deletions
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6
src/vm_x86.dasc
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@@ -1522,7 +1522,7 @@ static void build_subroutines(BuildCtx *ctx)
| mov dword [BASE-4], LJ_TTAB // Store metatable as default result.
| mov [BASE-8], TAB:RB
| mov RA, TAB:RB->hmask
| and RA, STR:RC->hash
| and RA, STR:RC->sid
| imul RA, #NODE
| add NODE:RA, TAB:RB->node
|3: // Rearranged logic, because we expect _not_ to find the key.
@@ -4286,7 +4286,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
| mov TAB:RB, [BASE+RB*8]
|->BC_TGETS_Z: // RB = GCtab *, RC = GCstr *, refetches PC_RA.
| mov RA, TAB:RB->hmask
| and RA, STR:RC->hash
| and RA, STR:RC->sid
| imul RA, #NODE
| add NODE:RA, TAB:RB->node
|1:
@@ -4457,7 +4457,7 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
| mov TAB:RB, [BASE+RB*8]
|->BC_TSETS_Z: // RB = GCtab *, RC = GCstr *, refetches PC_RA.
| mov RA, TAB:RB->hmask
| and RA, STR:RC->hash
| and RA, STR:RC->sid
| imul RA, #NODE
| mov byte TAB:RB->nomm, 0 // Clear metamethod cache.
| add NODE:RA, TAB:RB->node