Measure vanilla bootstrap time

src/main/java/org/embeddedt/modernfix/mixin/feature/measure_time/BootstrapMixin.java

@@ -0,0 +1,31 @@
+package org.embeddedt.modernfix.mixin.feature.measure_time;
+
+import com.google.common.base.Stopwatch;
+import net.minecraft.util.registry.Bootstrap;
+import org.apache.logging.log4j.Logger;
+import org.objectweb.asm.Opcodes;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import java.util.concurrent.TimeUnit;
+
+@Mixin(Bootstrap.class)
+public class BootstrapMixin {
+    @Shadow @Final private static Logger LOGGER;
+    private static Stopwatch startWatch;
+    @Inject(method = "bootStrap", at = @At(value = "FIELD", opcode = Opcodes.PUTSTATIC, target = "Lnet/minecraft/util/registry/Bootstrap;isBootstrapped:Z", ordinal = 0))
+    private static void recordStartTime(CallbackInfo ci) {
+        startWatch = Stopwatch.createStarted();
+    }
+    @Inject(method = "bootStrap", at = @At("RETURN"))
+    private static void printStartTime(CallbackInfo ci) {
+        if(startWatch != null && startWatch.isRunning()) {
+            startWatch.stop();
+            LOGGER.info("Vanilla bootstrap took " + startWatch.elapsed(TimeUnit.MILLISECONDS) + " milliseconds");
+        }
+    }
+}

src/main/resources/modernfix.mixins.json

@@ -24,7 +24,8 @@
     "perf.sync_executor_sleep.SyncExecutorMixin",
     "perf.compress_biome_container.MixinBiomeContainer",
     "perf.nuke_empty_chunk_sections.MixinChunk",
-    "perf.cache_blockstate_cache_arrays.AbstractBlockStateCacheMixin"
+    "perf.cache_blockstate_cache_arrays.AbstractBlockStateCacheMixin",
+    "feature.measure_time.BootstrapMixin"
   ],
   "client": [
     "feature.measure_time.MinecraftMixin",