enhance(cmd/verify): add goroutine count to improve verify speed

core/commands/repo.go

@@ -2,12 +2,15 @@ package commands
 
 import (
 	"bytes"
+	"context"
 	"errors"
 	"fmt"
 	"io"
 	"os"
 	"path/filepath"
+	"runtime"
 	"strings"
+	"sync"
 	"text/tabwriter"
 
 	oldcmds "github.com/ipfs/go-ipfs/commands"
@@ -276,6 +279,48 @@ type VerifyProgress struct {
 	Progress int
 }
 
+func verifyWorkerRun(ctx context.Context, wg *sync.WaitGroup, keys <-chan cid.Cid, results chan<- string, bs bstore.Blockstore) {
+	defer wg.Done()
+
+	for k := range keys {
+		_, err := bs.Get(k)
+		if err != nil {
+			select {
+			case results <- fmt.Sprintf("block %s was corrupt (%s)", k, err):
+			case <-ctx.Done():
+				return
+			}
+
+			continue
+		}
+
+		select {
+		case results <- "":
+		case <-ctx.Done():
+			return
+		}
+	}
+}
+
+func verifyResultChan(ctx context.Context, keys <-chan cid.Cid, bs bstore.Blockstore) <-chan string {
+	results := make(chan string)
+
+	go func() {
+		defer close(results)
+
+		var wg sync.WaitGroup
+
+		for i := 0; i < runtime.NumCPU()*2; i++ {
+			wg.Add(1)
+			go verifyWorkerRun(ctx, &wg, keys, results, bs)
+		}
+
+		wg.Wait()
+	}()
+
+	return results
+}
+
 var repoVerifyCmd = &oldcmds.Command{
 	Helptext: cmdkit.HelpText{
 		Tagline: "Verify all blocks in repo are not corrupted.",
@@ -300,15 +345,14 @@ var repoVerifyCmd = &oldcmds.Command{
 			return
 		}
 
+		results := verifyResultChan(req.Context(), keys, bs)
+
 		var fails int
 		var i int
-		for k := range keys {
-			_, err := bs.Get(k)
-			if err != nil {
+		for msg := range results {
+			if msg != "" {
 				select {
-				case out <- &VerifyProgress{
-					Msg: fmt.Sprintf("block %s was corrupt (%s)", k, err),
-				}:
+				case out <- &VerifyProgress{Msg: msg}:
 				case <-req.Context().Done():
 					return
 				}