From 8b0fe8cb8648bdb75d05d4c601e379cd5d9b3071 Mon Sep 17 00:00:00 2001
From: Olivier Grisel <olivier.grisel@ensta.org>
Date: Tue, 17 Jan 2012 02:40:57 +0100
Subject: [PATCH] DOC: add entry for murmurhash in the developer utilities
 section

---
 doc/developers/utilities.rst | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/doc/developers/utilities.rst b/doc/developers/utilities.rst
index d7f5331ebc..d05c3e0bc8 100644
--- a/doc/developers/utilities.rst
+++ b/doc/developers/utilities.rst
@@ -263,6 +263,20 @@ Helper Functions
   boolean masks and integer indices).
 
 
+Hash Functions
+==============
+
+- :func:`murmurhash3_32` provides a python wrapper for the
+  `MurmurHash3_x86_32` C++ non cryptographic hash function. This hash
+  function is suitable for implementing lookup tables, Bloom filters,
+  Count Min Sketch, feature hashing and implicitly defined sparse
+  random projections.
+
+  The ``sklearn.utils.murmurhash`` module can also be "cimported" from
+  other cython modules so as to benefit from the high performance of
+  MurmurHash while skipping the overhead of the Python interpreter.
+
+
 Warnings and Exceptions
 =======================
 
-- 
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