From: bors <bors@rust-lang.org>
Date: Sat, 3 Mar 2018 21:32:24 +0000 (+0000)
Subject: Auto merge of #5112 - Eh2406:cache_queries, r=alexcrichton
X-Git-Tag: archive/raspbian/0.35.0-2+rpi1~3^2^2^2^2^2^2^2~22^2~2^2~64
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Auto merge of #5112 - Eh2406:cache_queries, r=alexcrichton

Cache the query result.

Small performance gain.

In a test on https://github.com/rust-lang/cargo/issues/4810#issuecomment-357553286
Before we got to 1700000 ticks in ~97 sec
After we got to 1700000 ticks in ~92 sec. I just reran and got ~82, so it seems to be unstable.
And query disappears from the flame graph
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adadfab5dd91917f404af566c6622e65576a2b3d