graph: switch tooltip lookups to being range based in a prio tree
authorJens Axboe <axboe@kernel.dk>
Wed, 21 Mar 2012 16:17:45 +0000 (17:17 +0100)
committerJens Axboe <axboe@kernel.dk>
Wed, 21 Mar 2012 16:17:45 +0000 (17:17 +0100)
This cuts a lot of the CPU usage from browsing bigger graphs. Even
the normal graphs are typically cut in half.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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