From 45e41b1bb4b3919bdcfca4f15e0b0e2fac9721a3 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Sun, 3 Sep 2017 00:56:15 -0700
Subject: [PATCH] writer: alloc pool lazily.

---
 lib/utils/staticwriter.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/utils/staticwriter.js b/lib/utils/staticwriter.js
index 46040962..0530c096 100644
--- a/lib/utils/staticwriter.js
+++ b/lib/utils/staticwriter.js
@@ -10,8 +10,10 @@ const assert = require('assert');
 const encoding = require('./encoding');
 const digest = require('../crypto/digest');
 
-const POOL = Buffer.allocUnsafeSlow(100 * 1024);
 const EMPTY = Buffer.alloc(0);
+const POOLSIZE = 100 << 10;
+
+let POOL = null;
 
 /**
  * Statically allocated buffer writer.
@@ -35,11 +37,15 @@ function StaticWriter(size) {
  */
 
 StaticWriter.pool = function pool(size) {
-  if (size <= POOL.length) {
+  if (size <= POOLSIZE) {
+    if (!POOL)
+      POOL = Buffer.allocUnsafeSlow(POOLSIZE);
+
     const bw = new StaticWriter(0);
     bw.data = POOL.slice(0, size);
     return bw;
   }
+
   return new StaticWriter(size);
 };