Optimize DDCachingPoolStrategy
Reduce default cache size in EvictingCacheProvider, and return a NoOp CacheProvider when classloader is going to be skipped.
MODIFY
dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/DDCachingPoolStrategy.java
dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/DDCachingPoolStrategy.java
package datadog.trace.agent.tooling;
import static datadog.trace.agent.tooling.ClassLoaderMatcher.BOOTSTRAP_CLASSLOADER;
+import static datadog.trace.agent.tooling.ClassLoaderMatcher.skipClassLoader;
import static net.bytebuddy.agent.builder.AgentBuilder.PoolStrategy;
import com.google.common.cache.Cache;
@@ -45,7 +46,14 @@ public class DDCachingPoolStrategy implements PoolStrategy {
synchronized (key) {
cache = typePoolCache.get(key);
if (null == cache) {
+ if (skipClassLoader().matches(classLoader)) {
+ // Don't bother creating a cache for a classloader that won't match.
+ // (avoiding a lot of DelegatingClassLoader instances)
+ // This is primarily an optimization.
+ cache = TypePool.CacheProvider.NoOp.INSTANCE;
+ } else {
cache = EvictingCacheProvider.withObjectType(cleaner, 1, TimeUnit.MINUTES);
+ }
typePoolCache.put(key, cache);
}
}
@@ -64,7 +72,7 @@ public class DDCachingPoolStrategy implements PoolStrategy {
final Cleaner cleaner, final long expireDuration, final TimeUnit unit) {
cache =
CacheBuilder.newBuilder()
- .initialCapacity(1000)
+ .initialCapacity(100) // Per classloader, so we want a small default.
.maximumSize(10000)
.expireAfterAccess(expireDuration, unit)
.build();

Optimize DDCachingPoolStrategy

Reduce default cache size in EvictingCacheProvider, and return a NoOp CacheProvider when classloader is going to be skipped.