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Update optimize-query-performance-with-indexes-and-projections.txt #1058

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Update optimize-query-performance-with-indexes-and-projections.txt #1058

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4 changes: 2 additions & 2 deletions source/tutorial/optimize-query-performance-with-indexes-and-projections.txt
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Expand Up @@ -10,8 +10,8 @@ Create Indexes to Support Queries
For commonly issued queries, create :doc:`indexes </indexes>`. If a
query searches multiple fields, create a :ref:`compound index
<index-type-compound>`. Scanning an index is much faster than scanning a
collection. The indexes structures are smaller than the documents
reference, and store references in order.
collection. The index structures are smaller than the documents they
reference, and these references are stored in order.

.. example:: If you have a ``posts`` collection containing blog posts,
and if you regularly issue a query that sorts on the ``author_name``
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