joemarshall commented on code in PR #37822:
URL: https://github.com/apache/arrow/pull/37822#discussion_r1633281502


##########
python/pyarrow/tests/test_io.py:
##########
@@ -1073,6 +1073,8 @@ def _try_delete(path):
 
 
 def test_memory_map_writer(tmpdir):
+    if sys.platform == "emscripten":
+        pytest.xfail("Multiple memory maps to same file don't work on 
emscripten")

Review Comment:
   I was hoping that some day memory mapped files would actually work properly 
on emscripten. Right now they involve a copy, so multiple maps don't work right.



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