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2 Commits

Author SHA1 Message Date
Rusty Russell
7caa37f0f1 gossipd: implement Dijkstra. 
Use a uintmap as our minheap.

Note that Dijkstra can give overlength routes, so some checks are disabled.

Comparison using gossipd/test/run-bench-find_route 100000 10:

Before:
	10 (10 succeeded) routes in 100000 nodes in 120087 msec (12008708402 nanoseconds per route)
After:
	10 (10 succeeded) routes in 100000 nodes in 2269 msec (226925462 nanoseconds per route)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2019-04-18 06:33:09 +00:00
Rusty Russell
6dfa46d65a gossipd/test: add test for handling overlong routes. 
This is a weakness with Dijkstra, so write an explicit unit test that
we can find a short enough (but more expensive) route.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
 2019-04-18 06:33:09 +00:00