all: prealloc slice with possible minimum capabilities

2 files changed, 2 insertions, 2 deletions

diff --git a/src/internal/profile/profile.go b/src/internal/profile/profile.go
index afd1dd72ee..c8529d916d 100644
--- a/src/internal/profile/profile.go
+++ b/src/internal/profile/profile.go
@@ -507,7 +507,7 @@ type Demangler func(name []string) (map[string]string, error)
 // it will silently preserve the original names in case of any errors.
 func (p *Profile) Demangle(d Demangler) error {
 	// Collect names to demangle.
-	var names []string
+	names := make([]string, 0, len(p.Function))
 	for _, fn := range p.Function {
 		names = append(names, fn.SystemName)
 	}
diff --git a/src/internal/trace/traceviewer/mmu.go b/src/internal/trace/traceviewer/mmu.go
index 190ce5afca..3de3b7fc2c 100644
--- a/src/internal/trace/traceviewer/mmu.go
+++ b/src/internal/trace/traceviewer/mmu.go
@@ -385,7 +385,7 @@ func (m *mmu) HandleDetails(w http.ResponseWriter, r *http.Request) {
 	worst := mmuCurve.Examples(time.Duration(window), 10)
 
 	// Construct a link for each window.
-	var links []linkedUtilWindow
+	links := make([]linkedUtilWindow, 0, len(worst))
 	for _, ui := range worst {
 		links = append(links, m.newLinkedUtilWindow(ui, time.Duration(window)))
 	}