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db: cache SCM instance short-term (tied to SQLAlchemy session lifetime)
Repeatedly checking whether SCM instances are invalidated is slow, and
we don't actually _want_ SCM instances to invalidate half-way through
a request either.
Therefore cache them in on the db.Repository object, the lifetime
of which is directly tied to the lifetime of the SQLAlchemy session,
the lifetime of which is tied directly to the individual HTTP request.
This way, we only check for invalidation the first time the SCM instance
is accessed in a request.
This will improve performance in cases where we have (by definition) badly
written code that retrieves repo objects several times.
Repeatedly checking whether SCM instances are invalidated is slow, and
we don't actually _want_ SCM instances to invalidate half-way through
a request either.
Therefore cache them in on the db.Repository object, the lifetime
of which is directly tied to the lifetime of the SQLAlchemy session,
the lifetime of which is tied directly to the individual HTTP request.
This way, we only check for invalidation the first time the SCM instance
is accessed in a request.
This will improve performance in cases where we have (by definition) badly
written code that retrieves repo objects several times.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | <!DOCTYPE html>
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<h1><span>Mergely License - Closed Distribution License</span></h1>
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<h1>Mergely License</h1>
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All Mergely code is Copyright 2014 by Jamie Peabody.
Mergely is distributed under the
<a href="http://www.gnu.org/licenses/gpl.html">GPL</a>,
<a href="http://www.gnu.org/licenses/lgpl.html">LGPL</a>
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<h2>Mergely Commercial License - Closed Distribution License - CDL</h2>
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You may contact <a href="mailto:jamie.peabody@gmail.com">Jamie Peabody</a> to enquire about
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This license offers a very flexible way to integrate Mergely in your commercial
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Modifications and enhancements do not need to be released under an Open
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The CDL is a lifetime license valid for all previous releases of Mergely published
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