PragmaTwice commented on code in PR #1444:
URL:
https://github.com/apache/incubator-kvrocks/pull/1444#discussion_r1199579994
##########
src/types/redis_set.cc:
##########
@@ -338,19 +338,43 @@ rocksdb::Status Set::Inter(const std::vector<Slice>
&keys, std::vector<std::stri
for (const auto &member : target_members) {
member_counters[member] = 1;
}
+
+ bool has_limit = limit != 0;
+ bool limited = false;
for (size_t i = 1; i < keys.size(); i++) {
s = Members(keys[i], &target_members);
if (!s.ok() || target_members.empty()) return s;
for (const auto &member : target_members) {
- if (member_counters.find(member) == member_counters.end()) continue;
+ if (member_counters.count(member) == 0) continue;
member_counters[member]++;
+ if (has_limit && member_counters[member] == keys.size()) {
Review Comment:
Why do we search for the `member` element three times in `member_counters`
continuously? It looks so bad to me.
```c++
auto iter = find(member); // find it
use1(iter); // use it
use2(iter);
// **NOT**:
use1(find(member));
use2(find(member));
use3(find(member));
```
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