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improve performance of Consumer::poll_batch() by allocating the results array once, rather than incremental growth. Also avoid checking every single pointer in the returned array, just use the returned counter instead

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arvidn
2018-02-08 12:21:13 +01:00
parent deff8b1ff3
commit 98b9839ff9
1 changed files with 5 additions and 3 deletions
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8
src/consumer.cpp
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@@ -214,12 +214,14 @@ vector<Message> Consumer::poll_batch(size_t max_batch_size, milliseconds timeout
raw_messages.size());
if (result == -1) {
check_error(rd_kafka_last_error());
// on the off-chance that check_error() does not throw an error
result = 0;
}
vector<Message> output;
raw_messages.resize(result);
output.reserve(result);
for (const auto ptr : raw_messages) {
if (ptr) {
output.emplace_back(ptr);
}
output.emplace_back(ptr);
}
return output;
}