Restore dlmalloc as default allocator.

Author: juj

src/settings.js

@@ -120,7 +120,7 @@ var TOTAL_MEMORY = 16777216;
 // allocate very many small objects, you should use emmalloc since it's
 // smaller. Otherwise, if you do allocate many small objects, dlmalloc
 // is usually worth the extra size.
-var MALLOC = "emmalloc";
+var MALLOC = "dlmalloc";
 
 // If 1, then when malloc would fail we abort(). This is nonstandard behavior,
 // but makes sense for the web since we have a fixed amount of memory that

tests/test_core.py

@@ -1133,11 +1133,6 @@ def test_setjmp_noleak(self):
   printf("ok.\n");
 }
 '''
-    # This test uses mallinfo() to track memory leaks in a way
-    # that is not applicable to emmalloc, so ensure that the
-    # test is using dlmalloc.
-    self.set_setting('MALLOC', 'dlmalloc')
-
     self.do_run(src, r'''ok.''')
 
   def test_exceptions(self):