Performance tuning - eager rune array conversion

    > wc -l /tmp/list2
     2594098 /tmp/list2

    > time cat /tmp/list2 | fzf-0.10.1-darwin_amd64 -fqwerty > /dev/null

    real    0m5.418s
    user    0m10.990s
    sys     0m1.302s

    > time cat /tmp/list2 | fzf-head -fqwerty > /dev/null

    real    0m4.862s
    user    0m6.619s
    sys     0m0.982s

1 files changed, 8 insertions, 8 deletions

diff --git a/src/chunklist_test.go b/src/chunklist_test.go
index 2f8ef7e5..faaf04fe 100644
--- a/src/chunklist_test.go
+++ b/src/chunklist_test.go
@@ -6,7 +6,7 @@ import (
 )
 
 func TestChunkList(t *testing.T) {
-	cl := NewChunkList(func(s *string, i int) *Item {
+	cl := NewChunkList(func(s []rune, i int) *Item {
 		return &Item{text: s, rank: Rank{0, 0, uint32(i * 2)}}
 	})
 
@@ -17,8 +17,8 @@ func TestChunkList(t *testing.T) {
 	}
 
 	// Add some data
-	cl.Push("hello")
-	cl.Push("world")
+	cl.Push([]rune("hello"))
+	cl.Push([]rune("world"))
 
 	// Previously created snapshot should remain the same
 	if len(snapshot) > 0 {
@@ -36,8 +36,8 @@ func TestChunkList(t *testing.T) {
 	if len(*chunk1) != 2 {
 		t.Error("Snapshot should contain only two items")
 	}
-	if *(*chunk1)[0].text != "hello" || (*chunk1)[0].rank.index != 0 ||
-		*(*chunk1)[1].text != "world" || (*chunk1)[1].rank.index != 2 {
+	if string((*chunk1)[0].text) != "hello" || (*chunk1)[0].rank.index != 0 ||
+		string((*chunk1)[1].text) != "world" || (*chunk1)[1].rank.index != 2 {
 		t.Error("Invalid data")
 	}
 	if chunk1.IsFull() {
@@ -46,7 +46,7 @@ func TestChunkList(t *testing.T) {
 
 	// Add more data
 	for i := 0; i < chunkSize*2; i++ {
-		cl.Push(fmt.Sprintf("item %d", i))
+		cl.Push([]rune(fmt.Sprintf("item %d", i)))
 	}
 
 	// Previous snapshot should remain the same
@@ -64,8 +64,8 @@ func TestChunkList(t *testing.T) {
 		t.Error("Unexpected number of items")
 	}
 
-	cl.Push("hello")
-	cl.Push("world")
+	cl.Push([]rune("hello"))
+	cl.Push([]rune("world"))
 
 	lastChunkCount := len(*snapshot[len(snapshot)-1])
 	if lastChunkCount != 2 {