5 files changed, 14 insertions, 8 deletions
diff --git a/src/cmd/link/internal/ld/ar.go b/src/cmd/link/internal/ld/ar.go
index ae7554c929..779f3565f9 100644
--- a/src/cmd/link/internal/ld/ar.go
+++ b/src/cmd/link/internal/ld/ar.go
@@ -105,7 +105,8 @@ func hostArchive(ctxt *Link, name string) {
 	for any {
 		var load []uint64
 		for _, s := range ctxt.Syms.Allsym {
-			for _, r := range s.R {
+			for i := range s.R {
+				r := &s.R[i] // Copying sym.Reloc has measurable impact on peformance
 				if r.Sym != nil && r.Sym.Type == sym.SXREF {
 					if off := armap[r.Sym.Name]; off != 0 && !loaded[off] {
 						load = append(load, off)
diff --git a/src/cmd/link/internal/ld/data.go b/src/cmd/link/internal/ld/data.go
index d71b8b6ac7..5dd4aac03e 100644
--- a/src/cmd/link/internal/ld/data.go
+++ b/src/cmd/link/internal/ld/data.go
@@ -772,7 +772,8 @@ func Datblk(ctxt *Link, addr int64, size int64) {
 		if ctxt.LinkMode != LinkExternal {
 			continue
 		}
-		for _, r := range sym.R {
+		for i := range sym.R {
+			r := &sym.R[i] // Copying sym.Reloc has measurable impact on peformance
 			rsname := ""
 			if r.Sym != nil {
 				rsname = r.Sym.Name
diff --git a/src/cmd/link/internal/ld/deadcode.go b/src/cmd/link/internal/ld/deadcode.go
index 540f4068cb..df989cc944 100644
--- a/src/cmd/link/internal/ld/deadcode.go
+++ b/src/cmd/link/internal/ld/deadcode.go
@@ -245,8 +245,8 @@ func (d *deadcodepass) init() {
 				// but we do keep the symbols it refers to.
 				exports := d.ctxt.Syms.ROLookup("go.plugin.exports", 0)
 				if exports != nil {
-					for _, r := range exports.R {
-						d.mark(r.Sym, nil)
+					for i := range exports.R {
+						d.mark(exports.R[i].Sym, nil)
 					}
 				}
 			}
diff --git a/src/cmd/link/internal/ld/dwarf.go b/src/cmd/link/internal/ld/dwarf.go
index ae6f90b079..c803180cad 100644
--- a/src/cmd/link/internal/ld/dwarf.go
+++ b/src/cmd/link/internal/ld/dwarf.go
@@ -1061,7 +1061,8 @@ func getCompilationDir() string {
 func importInfoSymbol(ctxt *Link, dsym *sym.Symbol) {
 	dsym.Attr |= sym.AttrNotInSymbolTable | sym.AttrReachable
 	dsym.Type = sym.SDWARFINFO
-	for _, r := range dsym.R {
+	for i := range dsym.R {
+		r := &dsym.R[i] // Copying sym.Reloc has measurable impact on peformance
 		if r.Type == objabi.R_DWARFSECREF && r.Sym.Size == 0 {
 			if ctxt.BuildMode == BuildModeShared {
 				// These type symbols may not be present in BuildModeShared. Skip.
@@ -1090,7 +1091,8 @@ func collectAbstractFunctions(ctxt *Link, fn *sym.Symbol, dsym *sym.Symbol, absf
 
 	// Walk the relocations on the primary subprogram DIE and look for
 	// references to abstract funcs.
-	for _, reloc := range dsym.R {
+	for i := range dsym.R {
+		reloc := &dsym.R[i] // Copying sym.Reloc has measurable impact on peformance
 		candsym := reloc.Sym
 		if reloc.Type != objabi.R_DWARFSECREF {
 			continue
@@ -1801,7 +1803,8 @@ func collectlocs(ctxt *Link, syms []*sym.Symbol, units []*compilationUnit) []*sy
 	empty := true
 	for _, u := range units {
 		for _, fn := range u.funcDIEs {
-			for _, reloc := range fn.R {
+			for i := range fn.R {
+				reloc := &fn.R[i] // Copying sym.Reloc has measurable impact on peformance
 				if reloc.Type == objabi.R_DWARFSECREF && strings.HasPrefix(reloc.Sym.Name, dwarf.LocPrefix) {
 					reloc.Sym.Attr |= sym.AttrReachable | sym.AttrNotInSymbolTable
 					syms = append(syms, reloc.Sym)
diff --git a/src/cmd/link/internal/ld/lib.go b/src/cmd/link/internal/ld/lib.go
index 9f89457753..d86b2aa544 100644
--- a/src/cmd/link/internal/ld/lib.go
+++ b/src/cmd/link/internal/ld/lib.go
@@ -503,7 +503,8 @@ func (ctxt *Link) loadlib() {
 		// objects, try to read them from the libgcc file.
 		any := false
 		for _, s := range ctxt.Syms.Allsym {
-			for _, r := range s.R {
+			for i := range s.R {
+				r := &s.R[i] // Copying sym.Reloc has measurable impact on peformance
 				if r.Sym != nil && r.Sym.Type == sym.SXREF && r.Sym.Name != ".got" {
 					any = true
 					break