optimize memory initializer if it is large

1 files changed, 11 insertions, 1 deletions

diff --git a/emcc b/emcc
index 4ad0706a..51ad3cf2 100755
--- a/emcc
+++ b/emcc
@@ -1913,7 +1913,7 @@ try:
       shared.try_delete(memfile)
       def repl(m):
         # handle chunking of the memory initializer
-        s = m.groups(0)[0][1:-1]
+        s = m.groups(0)[0]
         open(memfile, 'wb').write(''.join(map(lambda x: chr(int(x or '0')), s.split(','))))
         if DEBUG:
           # Copy into temp dir as well, so can be run there too
@@ -1924,6 +1924,7 @@ try:
       src = re.sub(shared.JS.memory_initializer_pattern, repl, open(final).read(), count=1)
       open(final + '.mem.js', 'w').write(src)
       final += '.mem.js'
+      src = None
       js_transform_tempfiles[-1] = final # simple text substitution preserves comment line number mappings
       if DEBUG:
         if os.path.exists(memfile):
@@ -1931,6 +1932,15 @@ try:
           logging.debug('wrote memory initialization to %s' % memfile)
         else:
           logging.debug('did not see memory initialization')
+  elif shared.Settings.USE_TYPED_ARRAYS == 2 and not shared.Settings.MAIN_MODULE and not shared.Settings.SIDE_MODULE:
+    # not writing a binary init, but we can at least optimize them by splitting them up
+    src = open(final).read()
+    src = shared.JS.optimize_initializer(src)
+    if src is not None:
+      logging.debug('optimizing memory initialization')
+      open(final + '.mem.js', 'w').write(src)
+      final += '.mem.js'
+      src = None
 
   # It is useful to run several js optimizer passes together, to save on unneeded unparsing/reparsing
   js_optimizer_queue = []