Shoothzj commented on a change in pull request #12837:
URL: https://github.com/apache/pulsar/pull/12837#discussion_r755185574



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File path: 
pulsar-testclient/src/main/java/org/apache/pulsar/testclient/DefaultMessageFormatter.java
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@@ -81,21 +81,18 @@ private float _getFloatValue(float size) {
 
     private String getStringValue(float size) {
         int s = (int) size;
-        if (size == 0) {

Review comment:
       That's the test-performance-producer for `%5s` stands for 5 length 
random string. The command is already widely use in performance tests. For 
people who want to use length for 20, they can use `%20s`




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