diff --git a/android/config.go b/android/config.go
index b811c55..d78bbf7 100644
--- a/android/config.go
+++ b/android/config.go
@@ -1320,6 +1320,10 @@
 	return c.IsEnvTrue("RUN_ERROR_PRONE")
 }
 
+func (c *config) RunErrorProneInline() bool {
+	return c.IsEnvTrue("RUN_ERROR_PRONE_INLINE")
+}
+
 // XrefCorpusName returns the Kythe cross-reference corpus name.
 func (c *config) XrefCorpusName() string {
 	return c.Getenv("XREF_CORPUS")
diff --git a/android/logtags.go b/android/logtags.go
index 1e92dad..abc37f9 100644
--- a/android/logtags.go
+++ b/android/logtags.go
@@ -14,10 +14,56 @@
 
 package android
 
-import "github.com/google/blueprint"
+import (
+	"strings"
+
+	"github.com/google/blueprint"
+)
+
+func init() {
+	RegisterParallelSingletonType("logtags", LogtagsSingleton)
+}
 
 type LogtagsInfo struct {
 	Logtags Paths
 }
 
 var LogtagsProviderKey = blueprint.NewProvider[*LogtagsInfo]()
+
+func LogtagsSingleton() Singleton {
+	return &logtagsSingleton{}
+}
+
+type logtagsSingleton struct{}
+
+func MergedLogtagsPath(ctx PathContext) OutputPath {
+	return PathForIntermediates(ctx, "all-event-log-tags.txt")
+}
+
+func (l *logtagsSingleton) GenerateBuildActions(ctx SingletonContext) {
+	var allLogtags Paths
+	ctx.VisitAllModules(func(module Module) {
+		if !module.ExportedToMake() {
+			return
+		}
+		if logtagsInfo, ok := OtherModuleProvider(ctx, module, LogtagsProviderKey); ok {
+			allLogtags = append(allLogtags, logtagsInfo.Logtags...)
+		}
+	})
+	allLogtags = SortedUniquePaths(allLogtags)
+	filteredLogTags := make([]Path, 0, len(allLogtags))
+	for _, p := range allLogtags {
+		// Logic copied from make:
+		// https://cs.android.com/android/platform/superproject/main/+/main:build/make/core/Makefile;l=987;drc=0585bb1bcf4c89065adaf709f48acc8b869fd3ce
+		if !strings.HasPrefix(p.String(), "vendor/") && !strings.HasPrefix(p.String(), "device/") && !strings.HasPrefix(p.String(), "out/") {
+			filteredLogTags = append(filteredLogTags, p)
+		}
+	}
+
+	builder := NewRuleBuilder(pctx, ctx)
+	builder.Command().
+		BuiltTool("merge-event-log-tags").
+		FlagWithOutput("-o ", MergedLogtagsPath(ctx)).
+		Inputs(filteredLogTags)
+	builder.Build("all-event-log-tags.txt", "merge logtags")
+}
diff --git a/filesystem/filesystem.go b/filesystem/filesystem.go
index b7a3adc..b30c0f7 100644
--- a/filesystem/filesystem.go
+++ b/filesystem/filesystem.go
@@ -872,29 +872,10 @@
 		return
 	}
 
-	logtagsFilePaths := make(map[string]bool)
-	ctx.WalkDeps(func(child, parent android.Module) bool {
-		if logtagsInfo, ok := android.OtherModuleProvider(ctx, child, android.LogtagsProviderKey); ok {
-			for _, path := range logtagsInfo.Logtags {
-				logtagsFilePaths[path.String()] = true
-			}
-		}
-		return true
-	})
-
-	if len(logtagsFilePaths) == 0 {
-		return
-	}
-
 	etcPath := rebasedDir.Join(ctx, "etc")
 	eventLogtagsPath := etcPath.Join(ctx, "event-log-tags")
 	builder.Command().Text("mkdir").Flag("-p").Text(etcPath.String())
-	cmd := builder.Command().BuiltTool("merge-event-log-tags").
-		FlagWithArg("-o ", eventLogtagsPath.String())
-
-	for _, path := range android.SortedKeys(logtagsFilePaths) {
-		cmd.Text(path)
-	}
+	builder.Command().Text("cp").Input(android.MergedLogtagsPath(ctx)).Text(eventLogtagsPath.String())
 
 	f.appendToEntry(ctx, eventLogtagsPath)
 }
diff --git a/java/base.go b/java/base.go
index 215285f..cd5550a 100644
--- a/java/base.go
+++ b/java/base.go
@@ -1442,20 +1442,27 @@
 			// build.
 			flags = enableErrorproneFlags(flags)
 		} else if hasErrorproneableFiles && ctx.Config().RunErrorProne() && j.properties.Errorprone.Enabled == nil {
-			// Otherwise, if the RUN_ERROR_PRONE environment variable is set, create
-			// a new jar file just for compiling with the errorprone compiler to.
-			// This is because we don't want to cause the java files to get completely
-			// rebuilt every time the state of the RUN_ERROR_PRONE variable changes.
-			// We also don't want to run this if errorprone is enabled by default for
-			// this module, or else we could have duplicated errorprone messages.
-			errorproneFlags := enableErrorproneFlags(flags)
-			errorprone := android.PathForModuleOut(ctx, "errorprone", jarName)
-			errorproneAnnoSrcJar := android.PathForModuleOut(ctx, "errorprone", "anno.srcjar")
+			if ctx.Config().RunErrorProneInline() {
+				// On CI, we're not going to toggle back/forth between errorprone and non-errorprone
+				// builds, so it's faster if we don't compile the module twice and instead always
+				// compile the module with errorprone.
+				flags = enableErrorproneFlags(flags)
+			} else {
+				// Otherwise, if the RUN_ERROR_PRONE environment variable is set, create
+				// a new jar file just for compiling with the errorprone compiler to.
+				// This is because we don't want to cause the java files to get completely
+				// rebuilt every time the state of the RUN_ERROR_PRONE variable changes.
+				// We also don't want to run this if errorprone is enabled by default for
+				// this module, or else we could have duplicated errorprone messages.
+				errorproneFlags := enableErrorproneFlags(flags)
+				errorprone := android.PathForModuleOut(ctx, "errorprone", jarName)
+				errorproneAnnoSrcJar := android.PathForModuleOut(ctx, "errorprone", "anno.srcjar")
 
-			transformJavaToClasses(ctx, errorprone, -1, uniqueJavaFiles, srcJars, errorproneAnnoSrcJar, errorproneFlags, nil,
-				"errorprone", "errorprone")
+				transformJavaToClasses(ctx, errorprone, -1, uniqueJavaFiles, srcJars, errorproneAnnoSrcJar, errorproneFlags, nil,
+					"errorprone", "errorprone")
 
-			extraJarDeps = append(extraJarDeps, errorprone)
+				extraJarDeps = append(extraJarDeps, errorprone)
+			}
 		}
 
 		if enableSharding {