diff --git a/internal/lsp/cache/external.go b/internal/lsp/cache/external.go
index ddb73675..5047a49f 100644
--- a/internal/lsp/cache/external.go
+++ b/internal/lsp/cache/external.go
@@ -10,6 +10,7 @@ import (
 	"os"
 
 	"golang.org/x/tools/internal/lsp/source"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/span"
 )
 
@@ -50,6 +51,8 @@ func (h *nativeFileHandle) Kind() source.FileKind {
 }
 
 func (h *nativeFileHandle) Read(ctx context.Context) ([]byte, string, error) {
+	ctx, ts := trace.StartSpan(ctx, "cache.nativeFileHandle.Read")
+	defer ts.End()
 	//TODO: this should fail if the version is not the same as the handle
 	data, err := ioutil.ReadFile(h.identity.URI.Filename())
 	if err != nil {
diff --git a/internal/lsp/cache/parse.go b/internal/lsp/cache/parse.go
index ed3a2d8b..0d485345 100644
--- a/internal/lsp/cache/parse.go
+++ b/internal/lsp/cache/parse.go
@@ -13,6 +13,7 @@ import (
 	"go/token"
 
 	"golang.org/x/tools/internal/lsp/source"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/memoize"
 )
 
@@ -73,6 +74,8 @@ func (h *parseGoHandle) Parse(ctx context.Context) (*ast.File, error) {
 }
 
 func parseGo(ctx context.Context, c *cache, fh source.FileHandle, mode source.ParseMode) (*ast.File, error) {
+	ctx, ts := trace.StartSpan(ctx, "cache.parseGo")
+	defer ts.End()
 	buf, _, err := fh.Read(ctx)
 	if err != nil {
 		return nil, err
diff --git a/internal/lsp/source/analysis.go b/internal/lsp/source/analysis.go
index c599e674..754cdedb 100644
--- a/internal/lsp/source/analysis.go
+++ b/internal/lsp/source/analysis.go
@@ -20,9 +20,12 @@ import (
 
 	"golang.org/x/sync/errgroup"
 	"golang.org/x/tools/go/analysis"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 )
 
 func analyze(ctx context.Context, v View, pkgs []Package, analyzers []*analysis.Analyzer) ([]*Action, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.analyze")
+	defer ts.End()
 	if ctx.Err() != nil {
 		return nil, ctx.Err()
 	}
diff --git a/internal/lsp/source/completion.go b/internal/lsp/source/completion.go
index 805c441a..8bf7e21b 100644
--- a/internal/lsp/source/completion.go
+++ b/internal/lsp/source/completion.go
@@ -13,6 +13,7 @@ import (
 
 	"golang.org/x/tools/go/ast/astutil"
 	"golang.org/x/tools/internal/lsp/snippet"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/span"
 )
 
@@ -263,6 +264,8 @@ type CompletionOptions struct {
 // the client to score the quality of the completion. For instance, some clients
 // may tolerate imperfect matches as valid completion results, since users may make typos.
 func Completion(ctx context.Context, view View, f GoFile, pos token.Pos, opts CompletionOptions) ([]CompletionItem, *Selection, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.Completion")
+	defer ts.End()
 	file := f.GetAST(ctx)
 	if file == nil {
 		return nil, nil, fmt.Errorf("no AST for %s", f.URI())
diff --git a/internal/lsp/source/format.go b/internal/lsp/source/format.go
index 07200a3c..398f3665 100644
--- a/internal/lsp/source/format.go
+++ b/internal/lsp/source/format.go
@@ -16,11 +16,14 @@ import (
 	"golang.org/x/tools/go/packages"
 	"golang.org/x/tools/internal/imports"
 	"golang.org/x/tools/internal/lsp/diff"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/span"
 )
 
 // Format formats a file with a given range.
 func Format(ctx context.Context, f GoFile, rng span.Range) ([]TextEdit, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.Format")
+	defer ts.End()
 	file := f.GetAST(ctx)
 	if file == nil {
 		return nil, fmt.Errorf("no AST for %s", f.URI())
@@ -50,6 +53,8 @@ func Format(ctx context.Context, f GoFile, rng span.Range) ([]TextEdit, error) {
 
 // Imports formats a file using the goimports tool.
 func Imports(ctx context.Context, view View, f GoFile, rng span.Range) ([]TextEdit, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.Imports")
+	defer ts.End()
 	data, _, err := f.Handle(ctx).Read(ctx)
 	if err != nil {
 		return nil, err
@@ -128,6 +133,8 @@ func buildProcessEnv(ctx context.Context, view View) *imports.ProcessEnv {
 }
 
 func computeTextEdits(ctx context.Context, file File, formatted string) (edits []TextEdit) {
+	ctx, ts := trace.StartSpan(ctx, "source.computeTextEdits")
+	defer ts.End()
 	data, _, err := file.Handle(ctx).Read(ctx)
 	if err != nil {
 		file.View().Session().Logger().Errorf(ctx, "Cannot compute text edits: %v", err)
diff --git a/internal/lsp/source/highlight.go b/internal/lsp/source/highlight.go
index c67377ff..eb3a25c2 100644
--- a/internal/lsp/source/highlight.go
+++ b/internal/lsp/source/highlight.go
@@ -11,10 +11,13 @@ import (
 	"go/token"
 
 	"golang.org/x/tools/go/ast/astutil"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/span"
 )
 
 func Highlight(ctx context.Context, f GoFile, pos token.Pos) ([]span.Span, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.Highlight")
+	defer ts.End()
 	file := f.GetAST(ctx)
 	if file == nil {
 		return nil, fmt.Errorf("no AST for %s", f.URI())
diff --git a/internal/lsp/source/hover.go b/internal/lsp/source/hover.go
index b66299ed..db412ef5 100644
--- a/internal/lsp/source/hover.go
+++ b/internal/lsp/source/hover.go
@@ -12,6 +12,8 @@ import (
 	"go/format"
 	"go/types"
 	"strings"
+
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 )
 
 type documentation struct {
@@ -31,6 +33,8 @@ const (
 )
 
 func (i *IdentifierInfo) Hover(ctx context.Context, markdownSupported bool, hoverKind HoverKind) (string, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.Hover")
+	defer ts.End()
 	h, err := i.decl.hover(ctx)
 	if err != nil {
 		return "", err
@@ -68,6 +72,8 @@ func formatDocumentation(hoverKind HoverKind, c *ast.CommentGroup) string {
 }
 
 func (d declaration) hover(ctx context.Context) (*documentation, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.hover")
+	defer ts.End()
 	obj := d.obj
 	switch node := d.node.(type) {
 	case *ast.GenDecl:
diff --git a/internal/lsp/source/identifier.go b/internal/lsp/source/identifier.go
index 981019f6..061c229b 100644
--- a/internal/lsp/source/identifier.go
+++ b/internal/lsp/source/identifier.go
@@ -13,6 +13,7 @@ import (
 	"strconv"
 
 	"golang.org/x/tools/go/ast/astutil"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/span"
 )
 
@@ -62,6 +63,8 @@ func Identifier(ctx context.Context, view View, f GoFile, pos token.Pos) (*Ident
 
 // identifier checks a single position for a potential identifier.
 func identifier(ctx context.Context, view View, f GoFile, pos token.Pos) (*IdentifierInfo, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.identifier")
+	defer ts.End()
 	file := f.GetAST(ctx)
 	if file == nil {
 		return nil, fmt.Errorf("no AST for %s", f.URI())
diff --git a/internal/lsp/source/references.go b/internal/lsp/source/references.go
index cab6a21c..0b199e68 100644
--- a/internal/lsp/source/references.go
+++ b/internal/lsp/source/references.go
@@ -10,6 +10,7 @@ import (
 	"go/ast"
 	"go/types"
 
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/span"
 )
 
@@ -25,6 +26,8 @@ type ReferenceInfo struct {
 // References returns a list of references for a given identifier within the packages
 // containing i.File. Declarations appear first in the result.
 func (i *IdentifierInfo) References(ctx context.Context) ([]*ReferenceInfo, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.References")
+	defer ts.End()
 	var references []*ReferenceInfo
 
 	// If the object declaration is nil, assume it is an import spec and do not look for references.
diff --git a/internal/lsp/source/rename.go b/internal/lsp/source/rename.go
index 41668a80..885b9903 100644
--- a/internal/lsp/source/rename.go
+++ b/internal/lsp/source/rename.go
@@ -15,6 +15,7 @@ import (
 	"regexp"
 
 	"golang.org/x/tools/go/types/typeutil"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/span"
 	"golang.org/x/tools/refactor/satisfy"
 )
@@ -36,6 +37,8 @@ type renamer struct {
 
 // Rename returns a map of TextEdits for each file modified when renaming a given identifier within a package.
 func (i *IdentifierInfo) Rename(ctx context.Context, newName string) (map[span.URI][]TextEdit, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.Rename")
+	defer ts.End()
 	if i.Name == newName {
 		return nil, fmt.Errorf("old and new names are the same: %s", newName)
 	}
diff --git a/internal/lsp/source/signature_help.go b/internal/lsp/source/signature_help.go
index ed232621..7a657b6b 100644
--- a/internal/lsp/source/signature_help.go
+++ b/internal/lsp/source/signature_help.go
@@ -12,6 +12,7 @@ import (
 	"go/types"
 
 	"golang.org/x/tools/go/ast/astutil"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 )
 
 type SignatureInformation struct {
@@ -25,6 +26,8 @@ type ParameterInformation struct {
 }
 
 func SignatureHelp(ctx context.Context, f GoFile, pos token.Pos) (*SignatureInformation, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.SignatureHelp")
+	defer ts.End()
 	file := f.GetAST(ctx)
 	if file == nil {
 		return nil, fmt.Errorf("no AST for %s", f.URI())
diff --git a/internal/lsp/source/symbols.go b/internal/lsp/source/symbols.go
index 879be50d..28ff24e0 100644
--- a/internal/lsp/source/symbols.go
+++ b/internal/lsp/source/symbols.go
@@ -12,6 +12,7 @@ import (
 	"go/token"
 	"go/types"
 
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/span"
 )
 
@@ -41,6 +42,8 @@ type Symbol struct {
 }
 
 func DocumentSymbols(ctx context.Context, f GoFile) ([]Symbol, error) {
+	ctx, ts := trace.StartSpan(ctx, "source.DocumentSymbols")
+	defer ts.End()
 	fset := f.FileSet()
 	file := f.GetAST(ctx)
 	if file == nil {
diff --git a/internal/lsp/symbols.go b/internal/lsp/symbols.go
index 0a908a8c..c24fceb9 100644
--- a/internal/lsp/symbols.go
+++ b/internal/lsp/symbols.go
@@ -9,10 +9,13 @@ import (
 
 	"golang.org/x/tools/internal/lsp/protocol"
 	"golang.org/x/tools/internal/lsp/source"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/span"
 )
 
 func (s *Server) documentSymbol(ctx context.Context, params *protocol.DocumentSymbolParams) ([]protocol.DocumentSymbol, error) {
+	ctx, ts := trace.StartSpan(ctx, "lsp.Server.documentSymbol")
+	defer ts.End()
 	uri := span.NewURI(params.TextDocument.URI)
 	view := s.session.ViewOf(uri)
 	f, m, err := getGoFile(ctx, view, uri)
diff --git a/internal/lsp/text_synchronization.go b/internal/lsp/text_synchronization.go
index 7fe8d81e..66f9a624 100644
--- a/internal/lsp/text_synchronization.go
+++ b/internal/lsp/text_synchronization.go
@@ -12,6 +12,7 @@ import (
 	"golang.org/x/tools/internal/jsonrpc2"
 	"golang.org/x/tools/internal/lsp/protocol"
 	"golang.org/x/tools/internal/lsp/source"
+	"golang.org/x/tools/internal/lsp/telemetry/trace"
 	"golang.org/x/tools/internal/span"
 )
 
@@ -64,6 +65,9 @@ func (s *Server) didChange(ctx context.Context, params *protocol.DidChangeTextDo
 	// Run diagnostics on the newly-changed file.
 	go func() {
 		ctx := view.BackgroundContext()
+		//TODO: connect the remote span?
+		ctx, ts := trace.StartSpan(ctx, "lsp:background-worker")
+		defer ts.End()
 		s.Diagnostics(ctx, view, uri)
 	}()
 	return nil