Marko Milenkovic created KAFKA-1607:
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Summary: Use of String format method in debug statement
Key: KAFKA-1607
URL: https://issues.apache.org/jira/browse/KAFKA-1607
Project: Kafka
Issue Type: Improvement
Affects Versions: 0.8.1.1
Reporter: Marko Milenkovic
Priority: Minor
Some classes in {{kafka.producer}} package use {{String.format}} which is very
slow operation. String.format is going to be evaluated even debug is not
enabled and it affects performance.
for example:
* {{kafka.producer.BrokerPartitionInfo}} line 41
{code}
debug("Getting broker partition info for topic %s".format(topic))
{code}
* {{kafka.producer.async.DefaultEventHandler}} line 62
{code}
debug("Handling %d events".format(events.size))
{code}
those lines are just an example, there are few more places where logs are
evaluated. Removing those debug statements from the code I got 3 times better
producer performance.
Can you please check
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