tinygo-org/tinygo
1
0
Fork 0
mirror of https://github.com/tinygo-org/tinygo.git synced 2026-08-17 11:13:27 +00:00
Code Issues Packages Projects Releases 6 Wiki Activity

reflect: optimize Zero() a little bit

Browse Source 
It could be expensive to call Size() three times, and it is unnecessary.
Instead, do it only once.

This results in a very small reduction of binary size if Zero() is used.
This commit is contained in:
Ayke van Laethem
2023-05-13 14:23:29 +02:00
committed by Ron Evans
parent af936f3261
commit 535e64adbc
1 changed files with 4 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/reflect/value.go
+4 -3
View File
@@ -1486,7 +1486,8 @@ func init() {
} }
func Zero(typ Type) Value { func Zero(typ Type) Value {
if typ.Size() <= unsafe.Sizeof(uintptr(0)) { size := typ.Size()
if size <= unsafe.Sizeof(uintptr(0)) {
return Value{ return Value{
typecode: typ.(*rawType), typecode: typ.(*rawType),
value: nil, value: nil,
@@ -1494,7 +1495,7 @@ func Zero(typ Type) Value {
} }
} }
if typ.Size() <= zerobufferLen { if size <= zerobufferLen {
return Value{ return Value{
typecode: typ.(*rawType), typecode: typ.(*rawType),
value: unsafe.Pointer(zerobuffer), value: unsafe.Pointer(zerobuffer),
@@ -1504,7 +1505,7 @@ func Zero(typ Type) Value {
return Value{ return Value{
typecode: typ.(*rawType), typecode: typ.(*rawType),
value: alloc(typ.Size(), nil), value: alloc(size, nil),
flags: valueFlagExported | valueFlagRO, flags: valueFlagExported | valueFlagRO,
} }
} }