From 5fd1aad98438a260f13b38468a420d3306ed4c10 Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Wed, 25 Jan 2017 18:48:04 +0900
Subject: [PATCH] cache the "hbs.buffer" system property in static field

because `System.getProperty` is slow

http://stackoverflow.com/q/18045391
---
 .../handlebars/internal/FastStringWriter.java | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/handlebars/src/main/java/com/github/jknack/handlebars/internal/FastStringWriter.java b/handlebars/src/main/java/com/github/jknack/handlebars/internal/FastStringWriter.java
index 8d41f747c..514475da3 100644
--- a/handlebars/src/main/java/com/github/jknack/handlebars/internal/FastStringWriter.java
+++ b/handlebars/src/main/java/com/github/jknack/handlebars/internal/FastStringWriter.java
@@ -29,11 +29,26 @@
  * @since 0.1.0
  */
 class FastStringWriter extends Writer {
+
+  /**
+   * buffer size for StrBuilder.
+   */
+  private static final int BUFFER_SIZE;
+
+  static {
+    int value;
+    try {
+      value = Integer.parseInt(System.getProperty("hbs.buffer", "1600"));
+    } catch (Throwable e) {
+      value = 1600;
+    }
+    BUFFER_SIZE = value;
+  }
+
   /**
    * The internal buffer.
    */
-  private StrBuilder buffer = new StrBuilder(Integer
-      .parseInt(System.getProperty("hbs.buffer", "1600")));
+  private StrBuilder buffer = new StrBuilder(BUFFER_SIZE);
 
   @Override
   public Writer append(final char c) throws IOException {