From a3fcb808a48a8bbcc785edd06d68b7a1fe079c8d Mon Sep 17 00:00:00 2001 From: Sverker Eriksson Date: Thu, 26 May 2016 12:13:50 +0200 Subject: erts: Improve bucket search for hipe_mfa_info by actually using the cached hash value. --- erts/emulator/hipe/hipe_bif0.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) (limited to 'erts/emulator') diff --git a/erts/emulator/hipe/hipe_bif0.c b/erts/emulator/hipe/hipe_bif0.c index 307d2424ce..918cdd61e6 100644 --- a/erts/emulator/hipe/hipe_bif0.c +++ b/erts/emulator/hipe/hipe_bif0.c @@ -1140,10 +1140,13 @@ static inline struct hipe_mfa_info *hipe_mfa_info_table_get_locked(Eterm m, Eter h = HIPE_MFA_HASH(m, f, arity); i = h & hipe_mfa_info_table.mask; p = hipe_mfa_info_table.bucket[i]; - for (; p; p = p->bucket.next) - /* XXX: do we want to compare p->bucket.hvalue as well? */ - if (p->m == m && p->f == f && p->a == arity) - return p; + for (; p; p = p->bucket.next) { + if (p->bucket.hvalue == h) { + if (p->m == m && p->f == f && p->a == arity) + return p; + } + else ASSERT(!(p->m == m && p->f == f && p->a == arity)); + } return NULL; } @@ -1167,10 +1170,13 @@ static struct hipe_mfa_info *hipe_mfa_info_table_put_rwlocked(Eterm m, Eterm f, h = HIPE_MFA_HASH(m, f, arity); i = h & hipe_mfa_info_table.mask; p = hipe_mfa_info_table.bucket[i]; - for (; p; p = p->bucket.next) - /* XXX: do we want to compare p->bucket.hvalue as well? */ - if (p->m == m && p->f == f && p->a == arity) - return p; + for (; p; p = p->bucket.next) { + if (p->bucket.hvalue == h) { + if (p->m == m && p->f == f && p->a == arity) + return p; + } + else ASSERT(!(p->m == m && p->f == f && p->a == arity)); + } p = hipe_mfa_info_table_alloc(m, f, arity); p->bucket.hvalue = h; p->bucket.next = hipe_mfa_info_table.bucket[i]; -- cgit v1.2.3