From 847210b799d9cce999acaf30d4d1089fdc203d09 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Tue, 27 Dec 2016 17:54:09 +0100
Subject: [PATCH] disable new alloctor behaviour for emscripten

---
 lib/system/alloc.nim | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/system/alloc.nim b/lib/system/alloc.nim
index 5b0955132..3b886b2fc 100644
--- a/lib/system/alloc.nim
+++ b/lib/system/alloc.nim
@@ -276,10 +276,11 @@ proc pageAddr(p: pointer): PChunk {.inline.} =
   #sysAssert(Contains(allocator.chunkStarts, pageIndex(result)))
 
 proc requestOsChunks(a: var MemRegion, size: int): PBigChunk =
-  if not a.blockChunkSizeIncrease:
-    a.nextChunkSize =
-      if a.currMem < 64 * 1024: PageSize*4
-      else: a.nextChunkSize*2
+  when not defined(emscripten):
+    if not a.blockChunkSizeIncrease:
+      a.nextChunkSize =
+        if a.currMem < 64 * 1024: PageSize*4
+        else: a.nextChunkSize*2
   var size = size
 
   if size > a.nextChunkSize: