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feat: improve performance on linkRecursiveCode 

fix #331
This commit is contained in:
Nao Yonashiro 2022-05-03 04:03:05 +09:00
parent 41b2e78a03
commit c07df9add6
1 changed files with 19 additions and 8 deletions
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27
internal/encoder/compiler.go
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@ -885,29 +885,40 @@ func (c *Compiler) codeToOpcode(ctx *compileContext, typ *runtime.Type, code Cod
}
func (c *Compiler) linkRecursiveCode(ctx *compileContext) {
recursiveCodes := map[uintptr]*CompiledCode{}
for _, recursive := range *ctx.recursiveCodes {
typeptr := uintptr(unsafe.Pointer(recursive.Type))
codes := ctx.structTypeToCodes[typeptr]
compiled := recursive.Jmp
compiled.Code = copyOpcode(codes.First())
code := compiled.Code
code.End.Next = newEndOp(&compileContext{}, recursive.Type)
code.Op = code.Op.PtrHeadToHead()
if recursiveCode, ok := recursiveCodes[typeptr]; ok {
*recursive.Jmp = *recursiveCode
continue
}
beforeLastCode := code.End
lastCode := beforeLastCode.Next
code := copyOpcode(codes.First())
code.Op = code.Op.PtrHeadToHead()
lastCode := newEndOp(&compileContext{}, recursive.Type)
lastCode.Op = OpRecursiveEnd
// OpRecursiveEnd must set before call TotalLength
code.End.Next = lastCode
totalLength := code.TotalLength()
// Idx, ElemIdx, Length must set after call TotalLength
lastCode.Idx = uint32((totalLength + 1) * uintptrSize)
lastCode.ElemIdx = lastCode.Idx + uintptrSize
lastCode.Length = lastCode.Idx + 2*uintptrSize
code.End.Next.Op = OpRecursiveEnd
// extend length to alloc slot for elemIdx + length
curTotalLength := uintptr(recursive.TotalLength()) + 3
nextTotalLength := uintptr(totalLength) + 3
compiled := recursive.Jmp
compiled.Code = code
compiled.CurLen = curTotalLength
compiled.NextLen = nextTotalLength
compiled.Linked = true
recursiveCodes[typeptr] = compiled
}
}