---

yaml
---
r: 153105
b: refs/heads/try2
c: 67c8a8d
h: refs/heads/master
i:
  153103: 950580c
v: v3

Author: erickt

[refs]

@@ -5,7 +5,7 @@ refs/heads/snap-stage3: 78a7676898d9f80ab540c6df5d4c9ce35bb50463
 refs/heads/try: 519addf6277dbafccbb4159db4b710c37eaa2ec5
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/heads/ndm: f3868061cd7988080c30d6d5bf352a5a5fe2460b
-refs/heads/try2: 717de500eefc2f501f12587fc9626944ab593ff8
+refs/heads/try2: 67c8a8d5dd90e476d0579df3738fe1e744ef68f1
 refs/heads/dist-snap: ba4081a5a8573875fed17545846f6f6902c8ba8d
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try2/src/libserialize/json.rs

@@ -299,11 +299,20 @@ fn escape_char(writer: &mut io::Writer, v: char) -> Result<(), io::IoError> {
     escape_bytes(writer, buf)
 }
 
-fn spaces(writer: &mut io::Writer, n: uint) -> Result<(), io::IoError> {
-    for _ in range(0, n) {
-        try!(writer.write_str(" "));
+fn spaces(wr: &mut io::Writer, mut n: uint) -> Result<(), io::IoError> {
+    static len: uint = 16;
+    static buf: [u8, ..len] = [b' ', ..len];
+
+    while n >= len {
+        try!(wr.write(buf));
+        n -= len;
+    }
+
+    if n > 0 {
+        wr.write(buf.slice_to(n))
+    } else {
+        Ok(())
     }
-    Ok(())
 }
 
 fn fmt_number_or_null(v: f64) -> String {