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8079840: G1StringDedupTable::deduplicate() reset String hash value unnecessarily

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Only set hash value if String's hash value was 0.

Reviewed-by: pliden, brutisso
This commit is contained in:
Jiangli Zhou 2015-05-11 15:06:02 -04:00
parent 961389c6ef
commit cb51ce598c
1 changed files with 4 additions and 4 deletions
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8
hotspot/src/share/vm/gc_implementation/g1/g1StringDedupTable.cpp
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@ -310,11 +310,11 @@ void G1StringDedupTable::deduplicate(oop java_string, G1StringDedupStat& stat) {
// Compute hash
hash = hash_code(value);
stat.inc_hashed();
}
if (use_java_hash() && hash != 0) {
// Store hash code in cache
java_lang_String::set_hash(java_string, hash);
if (use_java_hash() && hash != 0) {
// Store hash code in cache
java_lang_String::set_hash(java_string, hash);
}
}
typeArrayOop existing_value = lookup_or_add(value, hash);