[bitbake-devel] [PATCH 8/9] runqueue: Small performance optimisation

[Richard Purdie]

A minor performance optmisation to keep lists smaller when running large
builds. We can do this since once a task has been built, we don't need
to worry about it. This improves a major bottleneck that shows up on
performance profile charts in dryruns.

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
 lib/bb/runqueue.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/bb/runqueue.py b/lib/bb/runqueue.py
index 31de3ed1cf..18049436fd 100644
--- a/lib/bb/runqueue.py
+++ b/lib/bb/runqueue.py
@@ -207,6 +207,8 @@ class RunQueueScheduler(object):
 
     def newbuildable(self, task):
         self.buildable.add(task)
+        # Once tasks are running we don't need to worry about them again
+        self.buildable.difference_update(self.rq.runq_running)
 
     def removebuildable(self, task):
         self.buildable.remove(task)
-- 
2.20.1