Add Log4j2 benchmark tool

- Configurable thread count, duration, message size
- Multiple logging configurations: sync-immediate, sync-buffered
- AsyncLogger variants: 1k, 4k, 10k, 1m ring buffer sizes
- AsyncAppender variants: 1k, 4k, 10k, 1m buffer sizes
- Subprocess isolation for proper async logger initialization
- Cache dropping between tests for accurate benchmarks
- CSV output support

1 files changed, 16 insertions, 0 deletions

diff --git a/src/main/resources/log4j2-asyncapp-4k.xml b/src/main/resources/log4j2-asyncapp-4k.xml
new file mode 100644
index 0000000..af4a2f2
--- /dev/null
+++ b/src/main/resources/log4j2-asyncapp-4k.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="WARN">
+    <Appenders>
+        <File name="File" fileName="target/bench.log" immediateFlush="true">
+            <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
+        </File>
+        <Async name="Async" bufferSize="4096">
+            <AppenderRef ref="File"/>
+        </Async>
+    </Appenders>
+    <Loggers>
+        <Root level="info">
+            <AppenderRef ref="Async"/>
+        </Root>
+    </Loggers>
+</Configuration>