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Merge pull request #983 from DataDog/tyler/cache-soft-refs 

Optimize DDCachingPoolStrategy
This commit is contained in:
Tyler Benson 2019-09-11 09:41:48 -07:00 committed by GitHub
parent 07b58e1cf4 988b03b2f3
commit e895d7c3a7
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 10 additions and 2 deletions
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12
dd-java-agent/agent-tooling/src/main/java/datadog/trace/agent/tooling/DDCachingPoolStrategy.java
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@ -1,6 +1,7 @@
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) {
cache = EvictingCacheProvider.withObjectType(cleaner, 1, TimeUnit.MINUTES);
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();