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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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12
src/vm_arm.dasc
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@@ -1012,9 +1012,9 @@ static void build_subroutines(BuildCtx *ctx)
| cmp TAB:RB, #0
| beq ->fff_restv
| ldr CARG3, TAB:RB->hmask
| ldr CARG4, STR:RC->hash
| ldr CARG4, STR:RC->sid
| ldr NODE:INS, TAB:RB->node
| and CARG3, CARG3, CARG4 // idx = str->hash & tab->hmask
| and CARG3, CARG3, CARG4 // idx = str->sid & tab->hmask
| add CARG3, CARG3, CARG3, lsl #1
| add NODE:INS, NODE:INS, CARG3, lsl #3 // node = tab->node + idx*3*8
|3: // Rearranged logic, because we expect _not_ to find the key.
@@ -3500,10 +3500,10 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
|->BC_TGETS_Z:
| // (TAB:RB =) TAB:CARG1 = GCtab *, STR:RC = GCstr *, RA = dst*8
| ldr CARG3, TAB:CARG1->hmask
| ldr CARG4, STR:RC->hash
| ldr CARG4, STR:RC->sid
| ldr NODE:INS, TAB:CARG1->node
| mov TAB:RB, TAB:CARG1
| and CARG3, CARG3, CARG4 // idx = str->hash & tab->hmask
| and CARG3, CARG3, CARG4 // idx = str->sid & tab->hmask
| add CARG3, CARG3, CARG3, lsl #1
| add NODE:INS, NODE:INS, CARG3, lsl #3 // node = tab->node + idx*3*8
|1:
@@ -3647,10 +3647,10 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
|->BC_TSETS_Z:
| // (TAB:RB =) TAB:CARG1 = GCtab *, STR:RC = GCstr *, RA = dst*8
| ldr CARG3, TAB:CARG1->hmask
| ldr CARG4, STR:RC->hash
| ldr CARG4, STR:RC->sid
| ldr NODE:INS, TAB:CARG1->node
| mov TAB:RB, TAB:CARG1
| and CARG3, CARG3, CARG4 // idx = str->hash & tab->hmask
| and CARG3, CARG3, CARG4 // idx = str->sid & tab->hmask
| add CARG3, CARG3, CARG3, lsl #1
| mov CARG4, #0
| add NODE:INS, NODE:INS, CARG3, lsl #3 // node = tab->node + idx*3*8