Avoid alloc.

ncruces · ncruces · commit e92999bfe304 · 2024-08-12T17:36:06.000+01:00
diff --git a/util/vtabutil/parse.go b/util/vtabutil/parse.go
@@ -50,7 +50,8 @@ func Parse(sql string) (_ *Table, err error) {
 		copy(buf, sql)
 	}
 
-	r, err := mod.ExportedFunction("sql3parse_table").Call(ctx, sqlp, uint64(len(sql)), errp)
+	stack := [...]uint64{sqlp, uint64(len(sql)), errp}
+	err = mod.ExportedFunction("sql3parse_table").CallWithStack(ctx, stack[:])
 	if err != nil {
 		return nil, err
 	}
@@ -66,7 +67,7 @@ func Parse(sql string) (_ *Table, err error) {
 	}
 
 	var tab Table
-	tab.load(mod, uint32(r[0]), sql)
+	tab.load(mod, uint32(stack[0]), sql)
 	return &tab, nil
 }
 

Original file line number	Diff line number	Diff line change
`@@ -50,7 +50,8 @@ func Parse(sql string) (_ *Table, err error) {`
`50`	`50`	`copy(buf, sql)`
`51`	`51`	`}`
`52`	`52`
`53`		`- r, err := mod.ExportedFunction("sql3parse_table").Call(ctx, sqlp, uint64(len(sql)), errp)`
	`53`	`+ stack := [...]uint64{sqlp, uint64(len(sql)), errp}`
	`54`	`+ err = mod.ExportedFunction("sql3parse_table").CallWithStack(ctx, stack[:])`
`54`	`55`	`if err != nil {`
`55`	`56`	`return nil, err`
`56`	`57`	`}`
`@@ -66,7 +67,7 @@ func Parse(sql string) (_ *Table, err error) {`
`66`	`67`	`}`
`67`	`68`
`68`	`69`	`var tab Table`
`69`		`- tab.load(mod, uint32(r[0]), sql)`
	`70`	`+ tab.load(mod, uint32(stack[0]), sql)`
`70`	`71`	`return &tab, nil`
`71`	`72`	`}`
`72`	`73`