| commit | 880827312919e5829ab056b3f27284e24c2411c2 | [log] [tgz] |
|---|---|---|
| author | Ulf Adams <ulfjack@google.com> | Mon Oct 19 16:53:21 2015 +0000 |
| committer | Philipp Wollermann <philwo@google.com> | Tue Oct 20 16:35:42 2015 +0000 |
| tree | 177d671b76823e2b62a49ebf08a6b1bba9454a10 | |
| parent | fd03b83e11bf970cc87b36de89f8ab7214d687af [diff] |
Use a sorted set for the test suite expansion key to prevent non-determinism. While a normal set is theoretically sufficient, it can cause hard-to-reproduce problems. In particular, the iteration order of the expansion result depends on the iteration order of the requested targets. If there are multiple requests for the same set of targets, but with different orders, the results would depend on which request was made first. If a downstream function also inadvertantly depends on the iteration order, it can be hard to debug why it ended up with a different order than it requested. Alternatively, we could sort the result before returning it. We generally expect the key set to be smaller than the result set, so this should be ever so slightly more efficient. -- MOS_MIGRATED_REVID=105765514
{Fast, Correct} - Choose two
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