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Improved arg reuse.

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Nuno Cruces
2025-03-10 12:01:15 +00:00
parent 26adda4529
commit 9e7a0a875d
5 changed files with 51 additions and 47 deletions
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59
func.go
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@@ -5,6 +5,7 @@ import (
"io"
"iter"
"sync"
"sync/atomic"
"github.com/tetratelabs/wazero/api"
@@ -196,21 +197,19 @@ func compareCallback(ctx context.Context, mod api.Module, pApp ptr_t, nKey1 int3
}
func funcCallback(ctx context.Context, mod api.Module, pCtx, pApp ptr_t, nArg int32, pArg ptr_t) {
args := getFuncArgs()
defer putFuncArgs(args)
db := ctx.Value(connKey{}).(*Conn)
args := callbackArgs(db, nArg, pArg)
defer returnArgs(args)
fn := util.GetHandle(db.ctx, pApp).(ScalarFunction)
callbackArgs(db, args[:nArg], pArg)
fn(Context{db, pCtx}, args[:nArg]...)
fn(Context{db, pCtx}, *args...)
}
func stepCallback(ctx context.Context, mod api.Module, pCtx, pAgg, pApp ptr_t, nArg int32, pArg ptr_t) {
args := getFuncArgs()
defer putFuncArgs(args)
db := ctx.Value(connKey{}).(*Conn)
callbackArgs(db, args[:nArg], pArg)
args := callbackArgs(db, nArg, pArg)
defer returnArgs(args)
fn, _ := callbackAggregate(db, pAgg, pApp)
fn.Step(Context{db, pCtx}, args[:nArg]...)
fn.Step(Context{db, pCtx}, *args...)
}
func valueCallback(ctx context.Context, mod api.Module, pCtx, pAgg, pApp ptr_t, final int32) {
@@ -234,12 +233,11 @@ func valueCallback(ctx context.Context, mod api.Module, pCtx, pAgg, pApp ptr_t,
}
func inverseCallback(ctx context.Context, mod api.Module, pCtx, pAgg ptr_t, nArg int32, pArg ptr_t) {
args := getFuncArgs()
defer putFuncArgs(args)
db := ctx.Value(connKey{}).(*Conn)
callbackArgs(db, args[:nArg], pArg)
args := callbackArgs(db, nArg, pArg)
defer returnArgs(args)
fn := util.GetHandle(db.ctx, pAgg).(WindowFunction)
fn.Inverse(Context{db, pCtx}, args[:nArg]...)
fn.Inverse(Context{db, pCtx}, *args...)
}
func callbackAggregate(db *Conn, pAgg, pApp ptr_t) (AggregateFunction, ptr_t) {
@@ -258,28 +256,31 @@ func callbackAggregate(db *Conn, pAgg, pApp ptr_t) (AggregateFunction, ptr_t) {
return fn, 0
}
func callbackArgs(db *Conn, arg []Value, pArg ptr_t) {
for i := range arg {
arg[i] = Value{
var (
valueArgsPool sync.Pool
valueArgsLen atomic.Int32
)
func callbackArgs(db *Conn, nArg int32, pArg ptr_t) *[]Value {
arg, ok := valueArgsPool.Get().(*[]Value)
if !ok || cap(*arg) < int(nArg) {
max := valueArgsLen.Or(nArg) | nArg
lst := make([]Value, max)
arg = &lst
}
lst := (*arg)[:nArg]
for i := range lst {
lst[i] = Value{
c: db,
handle: util.Read32[ptr_t](db.mod, pArg+ptr_t(i)*ptrlen),
}
}
*arg = lst
return arg
}
var funcArgsPool sync.Pool
func putFuncArgs(p *[_MAX_FUNCTION_ARG]Value) {
clear(p[:])
funcArgsPool.Put(p)
}
func getFuncArgs() *[_MAX_FUNCTION_ARG]Value {
if p := funcArgsPool.Get(); p == nil {
return new([_MAX_FUNCTION_ARG]Value)
} else {
return p.(*[_MAX_FUNCTION_ARG]Value)
}
func returnArgs(p *[]Value) {
valueArgsPool.Put(p)
}
type aggregateFunc struct {
@@ -291,7 +292,7 @@ type aggregateFunc struct {
func (a *aggregateFunc) Step(ctx Context, arg ...Value) {
a.ctx = ctx
a.arg = arg
a.arg = append(a.arg[:0], arg...)
if _, more := a.next(); !more {
a.stop()
}