rule_parser uses []byte

intern target names: share the same string as much as possible.

$ ./repo/android.sh time kati -c -kati_memstats='alloc={{.Alloc}},total={{.TotalAlloc}},sys={{.Sys}},malloc={{.Mallocs}},free={{.Frees}},heap idle={{.HeapIdle}},inuse={{.HeapInuse}},released={{.HeapReleased}},pause={{.PauseTotalNs}},numGC={{.NumGC}}'
...
alloc=686232544,total=9471977912,sys=990856408,malloc=204647708,free=200142535,heap idle=5914624,inuse=909885440,released=0,pause=10103883229,numGC=341

1 files changed, 20 insertions, 0 deletions

diff --git a/symtab.go b/symtab.go
new file mode 100644
index 0000000..69b0b43
--- /dev/null
+++ b/symtab.go
@@ -0,0 +1,20 @@
+package main
+
+var symtab = make(map[string]string)
+
+func intern(s string) string {
+	if v, ok := symtab[s]; ok {
+		return v
+	}
+	symtab[s] = s
+	return s
+}
+
+func internBytes(s []byte) string {
+	if v, ok := symtab[string(s)]; ok {
+		return v
+	}
+	v := string(s)
+	symtab[v] = v
+	return v
+}