Hi.
The patch is about decrease of verification limit. I collected following
statistics:
godot WPA:
hash-table-verification-limit=0: 66s
hash-table-verification-limit=10: 69s
hash-table-verification-limit=100: 94s
make all runtime libraries in GCC for --disable-bootstrap
--disable-libsanitizer --disable-multilib
=0: 127s (17m30s user time)
=10: 130s (18m17s user time)
=100: 150s (20m37s user time)
That's why I'm suggesting default equal to 10. Moreover as items are rehashed
during a hash table
growth we always compare different items.
Ready for trunk?
Thanks,
Martin
gcc/ChangeLog:
2019-06-19 Martin Liska <mli...@suse.cz>
* params.def (PARAM_HASH_TABLE_VERIFICATION_LIMIT): Decrease
to 10.
---
gcc/params.def | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/params.def b/gcc/params.def
index 0db60951413..4567c17ba60 100644
--- a/gcc/params.def
+++ b/gcc/params.def
@@ -1435,7 +1435,7 @@ DEFPARAM(PARAM_HASH_TABLE_VERIFICATION_LIMIT,
"hash-table-verification-limit",
"The number of elements for which hash table verification is done for "
"each searched element.",
- 100, 0, 0)
+ 10, 0, 0)
/*
