diff --git a/.github/workflows/performance_score_director.yml b/.github/workflows/performance_score_director.yml
index bd5d7483..5443867b 100644
--- a/.github/workflows/performance_score_director.yml
+++ b/.github/workflows/performance_score_director.yml
@@ -16,7 +16,7 @@ on:
         required: true
       baseline:
         description: 'Timefold Solver release'
-        default: '1.15.0'
+        default: '1.16.0'
         required: true
       branch:
         description: 'Branch to benchmark (needs to use 999-SNAPSHOT)'
@@ -75,7 +75,7 @@ jobs:
           echo "forks=20" > scoredirector-benchmark.properties
           echo "warmup_iterations=10" >> scoredirector-benchmark.properties
           echo "measurement_iterations=10" >> scoredirector-benchmark.properties
-          echo "relative_score_error_threshold=0.025" >> scoredirector-benchmark.properties
+          echo "relative_score_error_threshold=0.02" >> scoredirector-benchmark.properties
           echo "score_director_type=cs" >> scoredirector-benchmark.properties
           echo "example=${{ matrix.example }}" >> scoredirector-benchmark.properties
           cat scoredirector-benchmark.properties
@@ -174,10 +174,10 @@ jobs:
           export DIFF_END=$(echo "scale=2; ($OLD_RANGE_END / $NEW_RANGE_END) * 100" | bc)
           export FAIL=false
           
-          if (( $(echo "$DIFF_MID >= 97.00" | bc -l) && $(echo "$DIFF_MID <= 103.00"|bc -l) )); then
-            # Ignore differences of up to 3 %.
+          if (( $(echo "$DIFF_MID >= 98.00" | bc -l) && $(echo "$DIFF_MID <= 102.00"|bc -l) )); then
+            # Ignore differences of up to 2 %.
             echo "### Performance unchanged" >> $GITHUB_STEP_SUMMARY
-            echo "(Decided to ignore a very small difference of under 3 %.)" >> $GITHUB_STEP_SUMMARY
+            echo "(Decided to ignore a very small difference of under 2 %.)" >> $GITHUB_STEP_SUMMARY
           else
             if [ "$NEW_RANGE_START" -le "$OLD_RANGE_END" ] && [ "$NEW_RANGE_END" -ge "$OLD_RANGE_START" ]; then
               if [ "$NEW_RANGE_START" -ge "$OLD_RANGE_MID" ]; then
diff --git a/run-coldstart.sh b/run-coldstart.sh
index 24339d18..1607698a 100755
--- a/run-coldstart.sh
+++ b/run-coldstart.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
 sudo -i sysctl kernel.perf_event_paranoid=1
 sudo -i sysctl kernel.kptr_restrict=0
-taskset -c 0 java -cp target/benchmarks.jar ai.timefold.solver.benchmarks.micro.coldstart.Main
\ No newline at end of file
+java -cp target/benchmarks.jar -Djmh.ignoreLock=true ai.timefold.solver.benchmarks.micro.coldstart.Main
\ No newline at end of file
diff --git a/run-scoredirector.sh b/run-scoredirector.sh
index fc5cff60..16b2676e 100755
--- a/run-scoredirector.sh
+++ b/run-scoredirector.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
 sudo -i sysctl kernel.perf_event_paranoid=1
 sudo -i sysctl kernel.kptr_restrict=0
-java -cp target/benchmarks.jar ai.timefold.solver.benchmarks.micro.scoredirector.Main
+java -cp target/benchmarks.jar -Djmh.ignoreLock=true ai.timefold.solver.benchmarks.micro.scoredirector.Main
diff --git a/src/main/java/ai/timefold/solver/benchmarks/micro/common/AbstractMain.java b/src/main/java/ai/timefold/solver/benchmarks/micro/common/AbstractMain.java
index 2bdb9373..ddc8858a 100644
--- a/src/main/java/ai/timefold/solver/benchmarks/micro/common/AbstractMain.java
+++ b/src/main/java/ai/timefold/solver/benchmarks/micro/common/AbstractMain.java
@@ -109,8 +109,10 @@ protected ChainedOptionsBuilder initAsyncProfiler(ChainedOptionsBuilder options)
                                     "output=jfr;" +
                                     "dir=" + resultsDirectory.toAbsolutePath() + ";" +
                                     "libPath=" + asyncProfilerPath);
-                })
-                .orElseThrow(() -> new IllegalStateException("Impossible state: Async profiler not found."));
+                }).orElseGet(() -> {
+                    LOGGER.warn("Async profiler not found.");
+                    return options;
+                });
     }
 
     protected void convertJfrToFlameGraphs() {
@@ -178,7 +180,7 @@ public ChainedOptionsBuilder getBaseJmhConfig(C configuration) {
                 .forks(configuration.getForkCount())
                 .warmupIterations(configuration.getWarmupIterations())
                 .measurementIterations(configuration.getMeasurementIterations())
-                .jvmArgs("-XX:+UseSerialGC", "-Xmx2g") // Throughput-focused GC.
+                .jvmArgs("-XX:+UseParallelGC", "-Xmx2g") // Throughput-focused GC.
                 .result(resultsDirectory.resolve("results.json").toAbsolutePath().toString())
                 .resultFormat(ResultFormatType.JSON)
                 .shouldDoGC(true);