diff --git a/asdf_compression/blsc/compressor.py b/asdf_compression/blsc/compressor.py
index 19886f2..61875e9 100644
--- a/asdf_compression/blsc/compressor.py
+++ b/asdf_compression/blsc/compressor.py
@@ -7,10 +7,15 @@ class BloscCompressor(Compressor):
     def compress(self, data, **kwargs):
         import blosc
 
-        yield blosc.compress(data, **kwargs)
+        # Type size, necessary for shuffle filter efficiency
+        # TODO: This should be the type size of the data actually stored, not just "byte" or "uint8"
+        typesize = data.itemsize
+
+        yield blosc.compress(data, typesize=typesize, **kwargs)
 
     def decompress(self, data, out, **kwargs):
         import blosc
 
+        # TODO: call `self._api.decompress_ptr` instead to avoid copying the output
         out[:] = blosc.decompress(b"".join(data), **kwargs)
         return out.nbytes