diff --git a/build.gradle b/build.gradle
index 3751ac2..99b5636 100644
--- a/build.gradle
+++ b/build.gradle
@@ -26,7 +26,7 @@ ext {
   lib_log4j2_core = "org.apache.logging.log4j:log4j-core:${version_log4j2}"
   lib_log4j2_slf4j_impl = "org.apache.logging.log4j:log4j-slf4j-impl:${version_log4j2}"
 
-  lib_primitive_collections='org.lucares:primitiveCollections:0.1.20201115124106'
+  lib_primitive_collections='org.lucares:primitiveCollections:0.2'
 
   lib_spring_boot_log4j2="org.springframework.boot:spring-boot-starter-log4j2:${version_spring}"
   lib_spring_boot_test="org.springframework.boot:spring-boot-starter-test:${version_spring}"
@@ -60,6 +60,7 @@ subprojects {
 
   // the repositories for external depenencies
   repositories {
+    mavenLocal()
     maven {
       url 'https://repo.lucares.de/'
       content { includeGroup "org.lucares" }
diff --git a/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/CumulativeDistributionCustomAggregator.java b/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/CumulativeDistributionCustomAggregator.java
index ac15c40..23bbc7b 100644
--- a/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/CumulativeDistributionCustomAggregator.java
+++ b/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/CumulativeDistributionCustomAggregator.java
@@ -58,10 +58,6 @@ public class CumulativeDistributionCustomAggregator implements CustomAggregator
             }
         }
 
-        public long getMaxValue() {
-            return maxValue;
-        }
-
         public Percentiles getPercentiles() {
             return percentiles;
         }
@@ -86,18 +82,15 @@ public class CumulativeDistributionCustomAggregator implements CustomAggregator
 
     @Override
     public void addValue(final long epochMilli, final long value) {
-        map.compute(value, 0, l -> l + 1);
+        map.compute(value, 0, (__, l) -> l + 1);
         totalValues++;
     }
 
     public Percentiles getPercentiles() {
-        final long start = System.nanoTime();
-
         final ToPercentiles toPercentiles = new ToPercentiles(totalValues);
         toPercentiles.collect(map);
 
         final Percentiles result = toPercentiles.getPercentiles();
-        System.out.println("getPercentiles took: " + (System.nanoTime() - start) / 1_000_000.0 + " ms");
         return result;
     }
 
@@ -107,10 +100,8 @@ public class CumulativeDistributionCustomAggregator implements CustomAggregator
             final char separator = ',';
             final char newline = '\n';
 
-            final long start = System.nanoTime();
             final ToPercentiles toPercentiles = new ToPercentiles(totalValues);
             toPercentiles.collect(map);
-            System.out.println("getAggregated took: " + (System.nanoTime() - start) / 1_000_000.0 + " ms");
 
             final File dataFile = File.createTempFile("data", ".dat", tmpDir.toFile());
             try (final Writer output = new BufferedWriter(
diff --git a/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/HistogramAggregator.java b/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/HistogramAggregator.java
index 02bb2c1..f0fca4a 100644
--- a/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/HistogramAggregator.java
+++ b/pdb-plotting/src/main/java/org/lucares/pdb/plot/api/HistogramAggregator.java
@@ -30,7 +30,7 @@ public class HistogramAggregator implements CustomAggregator {
         @Override
         public void accept(final long key, final long value) {
             final long bin = binWidth * (key / binWidth);
-            bins.compute(bin, 0, oldValue -> oldValue + value);
+            bins.compute(bin, 0, (__, oldValue) -> oldValue + value);
         }
 
         public LongLongHashMap getBins() {
@@ -52,7 +52,7 @@ public class HistogramAggregator implements CustomAggregator {
 
     @Override
     public void addValue(final long epochMilli, final long value) {
-        map.compute(value, 0, l -> l + 1);
+        map.compute(value, 0, (__, l) -> l + 1);
         min = min < value ? min : value;
         max = max > value ? max : value;
     }