Revert "Add mechanism to reduce profile size"

This reverts commit 9c191ebbce.
The trimproto option is no longer needed, removing it to avoid code growth.

internal/driver/commands.go

@@ -93,7 +93,6 @@ var pprofCommands = commands{
 	// Save binary formats to a file
 	"callgrind": {report.Callgrind, awayFromTTY("callgraph.out"), false, "Outputs a graph in callgrind format", reportHelp("callgrind", false, true)},
 	"proto":     {report.Proto, awayFromTTY("pb.gz"), false, "Outputs the profile in compressed protobuf format", ""},
-	"trimproto": {report.TrimProto, awayFromTTY("pb.gz"), false, "Outputs the profile in compressed protobuf format, removing info about infrequent functions to reduce profile size", ""},
 
 	// Generate report in DOT format and postprocess with dot
 	"gif": {report.Dot, invokeDot("gif"), false, "Outputs a graph image in GIF format", reportHelp("gif", false, true)},

internal/graph/graph.go

@@ -347,31 +347,6 @@ func joinLabels(s *profile.Sample) string {
 	return strings.Join(labels, `\n`)
 }
 
-// TrimProfile reduces the size of a profile by removing information
-// about locations that contribute to infrequent graph nodes,
-// determined by the value of nodefraction. The locations are
-// preserved, but their line information is removed.
-func TrimProfile(p *profile.Profile, o *Options, nodeFraction float64) *profile.Profile {
-	g, locationMap := newGraph(p, o)
-
-	totalValue, _ := g.Nodes.Sum()
-	cutoff := abs64(int64(float64(totalValue) * nodeFraction))
-
-	for _, l := range p.Location {
-		nodes := locationMap[l.ID]
-		if len(nodes) == 0 || len(l.Line) != len(nodes) {
-			continue
-		}
-		for i, n := range nodes {
-			if n.Cum < cutoff {
-				l.Line[i] = profile.Line{}
-			}
-		}
-	}
-
-	return p.Compact()
-}
-
 // isNegative returns true if the node is considered as "negative" for the
 // purposes of drop_negative.
 func isNegative(n *Node) bool {

internal/report/report.go

@@ -54,8 +54,6 @@ func Generate(w io.Writer, rpt *Report, obj plugin.ObjTool) error {
 		return printTags(w, rpt)
 	case Proto:
 		return rpt.prof.Write(w)
-	case TrimProto:
-		return printTrimmedProto(w, rpt)
 	case TopProto:
 		return printTopProto(w, rpt)
 	case Dis:
@@ -197,10 +195,7 @@ func (rpt *Report) newGraph(nodes graph.NodeSet) *graph.Graph {
 		}
 		s.NumLabel = numLabels
 	}
-	return graph.New(rpt.prof, graphOptions(o, nodes))
-}
 
-func graphOptions(o *Options, nodes graph.NodeSet) *graph.Options {
 	gopt := &graph.Options{
 		SampleValue:  o.SampleValue,
 		FormatTag:    formatTag,
@@ -216,7 +211,7 @@ func graphOptions(o *Options, nodes graph.NodeSet) *graph.Options {
 		gopt.ObjNames = true
 	}
 
-	return gopt
+	return graph.New(rpt.prof, gopt)
 }
 
 func formatTag(v int64, key string) string {
@@ -272,17 +267,6 @@ func printTopProto(w io.Writer, rpt *Report) error {
 	return out.Write(w)
 }
 
-// printTrimmedProto writes a profile in a serialize profile.proto,
-// removing symbol information from infrequent nodes to reduce the
-// size of the profile.
-func printTrimmedProto(w io.Writer, rpt *Report) error {
-	o := rpt.options
-	prof := rpt.prof
-	prof = graph.TrimProfile(prof, graphOptions(o, nil), o.NodeFraction)
-
-	return prof.Write(w)
-}
-
 // printAssembly prints an annotated assembly listing.
 func printAssembly(w io.Writer, rpt *Report, obj plugin.ObjTool) error {
 	o := rpt.options
@@ -871,7 +855,6 @@ const (
 	WebList
 	Callgrind
 	TopProto
-	TrimProto
 )
 
 // Options are the formatting and filtering options used to generate a