diff --git a/bp2build/metrics.go b/bp2build/metrics.go
index bd21629..d6e5cf3 100644
--- a/bp2build/metrics.go
+++ b/bp2build/metrics.go
@@ -148,11 +148,26 @@
 func (metrics *CodegenMetrics) AddEvent(event *bp2build_metrics_proto.Event) {
 	metrics.serialized.Events = append(metrics.serialized.Events, event)
 }
+
 func (metrics *CodegenMetrics) AddUnconvertedModule(moduleType string) {
 	metrics.serialized.UnconvertedModuleCount += 1
 	metrics.serialized.TotalModuleTypeCount[moduleType] += 1
 }
 
+func (metrics *CodegenMetrics) SetSymlinkCount(n uint64) {
+	if m := metrics.serialized.WorkspaceSymlinkCount; m != 0 {
+		fmt.Fprintf(os.Stderr, "unexpected non-zero workspaceSymlinkCount of %d", m)
+	}
+	metrics.serialized.WorkspaceSymlinkCount = n
+}
+
+func (metrics *CodegenMetrics) SetMkDirCount(n uint64) {
+	if m := metrics.serialized.WorkspaceMkDirCount; m != 0 {
+		fmt.Fprintf(os.Stderr, "unexpected non-zero workspaceDirCount of %d", m)
+	}
+	metrics.serialized.WorkspaceMkDirCount = n
+}
+
 func (metrics *CodegenMetrics) TotalModuleCount() uint64 {
 	return metrics.serialized.HandCraftedModuleCount +
 		metrics.serialized.GeneratedModuleCount +
diff --git a/bp2build/symlink_forest.go b/bp2build/symlink_forest.go
index 81ec7ee..4a4ae9e 100644
--- a/bp2build/symlink_forest.go
+++ b/bp2build/symlink_forest.go
@@ -46,9 +46,11 @@
 	topdir  string // $TOPDIR
 
 	// State
-	wg    sync.WaitGroup
-	depCh chan string
-	okay  atomic.Bool // Whether the forest was successfully constructed
+	wg           sync.WaitGroup
+	depCh        chan string
+	mkdirCount   atomic.Uint64
+	symlinkCount atomic.Uint64
+	okay         atomic.Bool // Whether the forest was successfully constructed
 }
 
 // A simple thread pool to limit concurrency on system calls.
@@ -288,6 +290,7 @@
 		fmt.Fprintf(os.Stderr, "Cannot mkdir '%s': %s\n", forestDir, err)
 		os.Exit(1)
 	}
+	context.mkdirCount.Add(1)
 
 	for f := range allEntries {
 		if f[0] == '.' {
@@ -318,6 +321,7 @@
 		if instructionsChild != nil && instructionsChild.excluded {
 			if bExists {
 				symlinkIntoForest(context.topdir, forestChild, buildFilesChild)
+				context.symlinkCount.Add(1)
 			}
 			continue
 		}
@@ -334,6 +338,7 @@
 			} else {
 				// Not in the source tree, symlink BUILD file
 				symlinkIntoForest(context.topdir, forestChild, buildFilesChild)
+				context.symlinkCount.Add(1)
 			}
 		} else if !bExists {
 			if sDir && instructionsChild != nil {
@@ -344,6 +349,7 @@
 			} else {
 				// Not in the build file tree, symlink source tree, carry on
 				symlinkIntoForest(context.topdir, forestChild, srcChild)
+				context.symlinkCount.Add(1)
 			}
 		} else if sDir && bDir {
 			// Both are directories. Descend.
@@ -417,15 +423,17 @@
 	wg.Wait()
 }
 
-// Creates a symlink forest by merging the directory tree at "buildFiles" and
+// PlantSymlinkForest Creates a symlink forest by merging the directory tree at "buildFiles" and
 // "srcDir" while excluding paths listed in "exclude". Returns the set of paths
 // under srcDir on which readdir() had to be called to produce the symlink
 // forest.
-func PlantSymlinkForest(verbose bool, topdir string, forest string, buildFiles string, exclude []string) []string {
+func PlantSymlinkForest(verbose bool, topdir string, forest string, buildFiles string, exclude []string) (deps []string, mkdirCount, symlinkCount uint64) {
 	context := &symlinkForestContext{
-		verbose: verbose,
-		topdir:  topdir,
-		depCh:   make(chan string),
+		verbose:      verbose,
+		topdir:       topdir,
+		depCh:        make(chan string),
+		mkdirCount:   atomic.Uint64{},
+		symlinkCount: atomic.Uint64{},
 	}
 
 	context.okay.Store(true)
@@ -440,7 +448,6 @@
 		close(context.depCh)
 	}()
 
-	deps := make([]string, 0)
 	for dep := range context.depCh {
 		deps = append(deps, dep)
 	}
@@ -449,5 +456,5 @@
 		os.Exit(1)
 	}
 
-	return deps
+	return deps, context.mkdirCount.Load(), context.symlinkCount.Load()
 }
diff --git a/cmd/soong_build/main.go b/cmd/soong_build/main.go
index baa7380..696c159 100644
--- a/cmd/soong_build/main.go
+++ b/cmd/soong_build/main.go
@@ -189,7 +189,7 @@
 
 	workspace := shared.JoinPath(ctx.Config().SoongOutDir(), "api_bp2build")
 	// Create the symlink forest
-	symlinkDeps := bp2build.PlantSymlinkForest(
+	symlinkDeps, _, _ := bp2build.PlantSymlinkForest(
 		ctx.Config().IsEnvTrue("BP2BUILD_VERBOSE"),
 		topDir,
 		workspace,
@@ -459,8 +459,10 @@
 // symlink tree creation binary. Then the latter would not need to depend on
 // the very heavy-weight machinery of soong_build .
 func runSymlinkForestCreation(ctx *android.Context, extraNinjaDeps []string, metricsDir string) string {
+	var ninjaDeps []string
+	var mkdirCount, symlinkCount uint64
+
 	ctx.EventHandler.Do("symlink_forest", func() {
-		var ninjaDeps []string
 		ninjaDeps = append(ninjaDeps, extraNinjaDeps...)
 		verbose := ctx.Config().IsEnvTrue("BP2BUILD_VERBOSE")
 
@@ -469,15 +471,16 @@
 		// or file created/deleted under it would trigger an update of the symlink forest.
 		generatedRoot := shared.JoinPath(ctx.Config().SoongOutDir(), "bp2build")
 		workspaceRoot := shared.JoinPath(ctx.Config().SoongOutDir(), "workspace")
+		var symlinkForestDeps []string
 		ctx.EventHandler.Do("plant", func() {
-			symlinkForestDeps := bp2build.PlantSymlinkForest(
+			symlinkForestDeps, mkdirCount, symlinkCount = bp2build.PlantSymlinkForest(
 				verbose, topDir, workspaceRoot, generatedRoot, excludedFromSymlinkForest(ctx, verbose))
-			ninjaDeps = append(ninjaDeps, symlinkForestDeps...)
 		})
-
-		writeDepFile(cmdlineArgs.SymlinkForestMarker, ctx.EventHandler, ninjaDeps)
-		touch(shared.JoinPath(topDir, cmdlineArgs.SymlinkForestMarker))
+		ninjaDeps = append(ninjaDeps, symlinkForestDeps...)
 	})
+
+	writeDepFile(cmdlineArgs.SymlinkForestMarker, ctx.EventHandler, ninjaDeps)
+	touch(shared.JoinPath(topDir, cmdlineArgs.SymlinkForestMarker))
 	codegenMetrics := bp2build.ReadCodegenMetrics(metricsDir)
 	if codegenMetrics == nil {
 		m := bp2build.CreateCodegenMetrics()
@@ -486,6 +489,8 @@
 		//TODO (usta) we cannot determine if we loaded a stale file, i.e. from an unrelated prior
 		//invocation of codegen. We should simply use a separate .pb file
 	}
+	codegenMetrics.SetSymlinkCount(symlinkCount)
+	codegenMetrics.SetMkDirCount(mkdirCount)
 	writeBp2BuildMetrics(codegenMetrics, ctx.EventHandler, metricsDir)
 	return cmdlineArgs.SymlinkForestMarker
 }
diff --git a/ui/metrics/bp2build_metrics_proto/bp2build_metrics.pb.go b/ui/metrics/bp2build_metrics_proto/bp2build_metrics.pb.go
index 93f3471..4821043 100644
--- a/ui/metrics/bp2build_metrics_proto/bp2build_metrics.pb.go
+++ b/ui/metrics/bp2build_metrics_proto/bp2build_metrics.pb.go
@@ -14,8 +14,8 @@
 
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.27.1
-// 	protoc        v3.9.1
+// 	protoc-gen-go v1.28.0
+// 	protoc        v3.21.7
 // source: bp2build_metrics.proto
 
 package bp2build_metrics_proto
@@ -45,6 +45,10 @@
 	HandCraftedModuleCount uint64 `protobuf:"varint,2,opt,name=handCraftedModuleCount,proto3" json:"handCraftedModuleCount,omitempty"`
 	// Total number of unconverted Soong modules
 	UnconvertedModuleCount uint64 `protobuf:"varint,3,opt,name=unconvertedModuleCount,proto3" json:"unconvertedModuleCount,omitempty"`
+	// Counts of symlinks in synthetic bazel workspace
+	WorkspaceSymlinkCount uint64 `protobuf:"varint,9,opt,name=workspaceSymlinkCount,proto3" json:"workspaceSymlinkCount,omitempty"`
+	// Counts of mkdir calls during creation of synthetic bazel workspace
+	WorkspaceMkDirCount uint64 `protobuf:"varint,10,opt,name=workspaceMkDirCount,proto3" json:"workspaceMkDirCount,omitempty"`
 	// Counts of generated Bazel targets per Bazel rule class
 	RuleClassCount map[string]uint64 `protobuf:"bytes,4,rep,name=ruleClassCount,proto3" json:"ruleClassCount,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"varint,2,opt,name=value,proto3"`
 	// List of converted modules
@@ -111,6 +115,20 @@
 	return 0
 }
 
+func (x *Bp2BuildMetrics) GetWorkspaceSymlinkCount() uint64 {
+	if x != nil {
+		return x.WorkspaceSymlinkCount
+	}
+	return 0
+}
+
+func (x *Bp2BuildMetrics) GetWorkspaceMkDirCount() uint64 {
+	if x != nil {
+		return x.WorkspaceMkDirCount
+	}
+	return 0
+}
+
 func (x *Bp2BuildMetrics) GetRuleClassCount() map[string]uint64 {
 	if x != nil {
 		return x.RuleClassCount
@@ -221,7 +239,7 @@
 	0x0a, 0x16, 0x62, 0x70, 0x32, 0x62, 0x75, 0x69, 0x6c, 0x64, 0x5f, 0x6d, 0x65, 0x74, 0x72, 0x69,
 	0x63, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x1c, 0x73, 0x6f, 0x6f, 0x6e, 0x67, 0x5f,
 	0x62, 0x75, 0x69, 0x6c, 0x64, 0x5f, 0x62, 0x70, 0x32, 0x62, 0x75, 0x69, 0x6c, 0x64, 0x5f, 0x6d,
-	0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x22, 0xe9, 0x06, 0x0a, 0x0f, 0x42, 0x70, 0x32, 0x42, 0x75,
+	0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x22, 0xd1, 0x07, 0x0a, 0x0f, 0x42, 0x70, 0x32, 0x42, 0x75,
 	0x69, 0x6c, 0x64, 0x4d, 0x65, 0x74, 0x72, 0x69, 0x63, 0x73, 0x12, 0x32, 0x0a, 0x14, 0x67, 0x65,
 	0x6e, 0x65, 0x72, 0x61, 0x74, 0x65, 0x64, 0x4d, 0x6f, 0x64, 0x75, 0x6c, 0x65, 0x43, 0x6f, 0x75,
 	0x6e, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x04, 0x52, 0x14, 0x67, 0x65, 0x6e, 0x65, 0x72, 0x61,
@@ -232,60 +250,66 @@
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 }
 
 var (
diff --git a/ui/metrics/bp2build_metrics_proto/bp2build_metrics.proto b/ui/metrics/bp2build_metrics_proto/bp2build_metrics.proto
index 19a7827..9ff4ae2 100644
--- a/ui/metrics/bp2build_metrics_proto/bp2build_metrics.proto
+++ b/ui/metrics/bp2build_metrics_proto/bp2build_metrics.proto
@@ -27,6 +27,12 @@
   // Total number of unconverted Soong modules
   uint64 unconvertedModuleCount = 3;
 
+  // Counts of symlinks in synthetic bazel workspace
+  uint64 workspaceSymlinkCount= 9;
+
+  // Counts of mkdir calls during creation of synthetic bazel workspace
+  uint64 workspaceMkDirCount= 10;
+
   // Counts of generated Bazel targets per Bazel rule class
   map<string, uint64> ruleClassCount = 4;