Excessive memory allocation

[ralf0131]

The following flame graph shows the memory allocation is beyond expectation. We should optimize it.

[ralf0131]

This should be fixed previously. The major allocation comes from com.alibaba.metrics.common.filter.MetricNameSetFilter#matches. To avoid string allocation, using the following logic instead.

success = name.getKey().startsWith(nameToMatch) && nameToMatch.length() == lastIndexOfDot;