ramanathan1504 commented on issue #4166:
URL:
https://github.com/apache/logging-log4j2/issues/4166#issuecomment-5030605779
@ppkarwasz @vy
```java
private static final String[] MDC_KEYS = {
"userId", "transactionId", "userRole",
"@timestamp", "message", "log.level"
};
private static final Pattern PATTERN =
Pattern.compile("^(?!@timestamp|message|log\\.logger|log\\.level|event\\.dataset|process\\.thread\\.name|process\\.thread\\.id|ecs\\.version).*$");
private static final Set<String> EXCLUDED_KEYS = new
HashSet<>(Arrays.asList(
"@timestamp", "message", "log.logger", "log.level",
"event.dataset", "process.thread.name", "process.thread.id",
"ecs.version"
));
@Benchmark
public int testRegex() {
int allowedCount = 0;
for (String key : MDC_KEYS) {
if (PATTERN.matcher(key).matches()) {
allowedCount++;
}
}
return allowedCount;
}
@Benchmark
public int testKeyExcludes() {
int allowedCount = 0;
for (String key : MDC_KEYS) {
if (!EXCLUDED_KEYS.contains(key)) {
allowedCount++;
}
}
return allowedCount;
}
```
#Result
```text
Benchmark Mode Cnt Score Error Units
MdcKeyFilterBenchmark.testKeyExcludes thrpt 5 83.571 ± 6.988 ops/us
MdcKeyFilterBenchmark.testRegex thrpt 5 4.500 ± 0.073 ops/us
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