diff --git a/chain/sub/incoming.go b/chain/sub/incoming.go
index f21af601eb1..bf2cd391449 100644
--- a/chain/sub/incoming.go
+++ b/chain/sub/incoming.go
@@ -30,8 +30,10 @@ import (
 	"github.com/filecoin-project/lotus/metrics"
 )
 
-var log = logging.Logger("sub")
-var DefaultHashFunction = uint64(mh.BLAKE2B_MIN + 31)
+var (
+	log                 = logging.Logger("sub")
+	DefaultHashFunction = uint64(mh.BLAKE2B_MIN + 31)
+)
 
 var msgCidPrefix = cid.Prefix{
 	Version:  1,
@@ -169,7 +171,6 @@ func fetchCids(
 	cids []cid.Cid,
 	cb func(int, blocks.Block) error,
 ) error {
-
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
@@ -327,7 +328,7 @@ func (mv *MessageValidator) Validate(ctx context.Context, pid peer.ID, msg *pubs
 
 	start := time.Now()
 	defer func() {
-		ms := time.Now().Sub(start).Microseconds()
+		ms := time.Since(start).Microseconds()
 		stats.Record(ctx, metrics.MessageValidationDuration.M(float64(ms)/1000))
 	}()
 
@@ -394,7 +395,7 @@ func (mv *MessageValidator) validateLocalMessage(ctx context.Context, msg *pubsu
 
 	start := time.Now()
 	defer func() {
-		ms := time.Now().Sub(start).Microseconds()
+		ms := time.Since(start).Microseconds()
 		stats.Record(ctx, metrics.MessageValidationDuration.M(float64(ms)/1000))
 	}()
 
diff --git a/cli/info.go b/cli/info.go
index 411a3169eb3..f011494665b 100644
--- a/cli/info.go
+++ b/cli/info.go
@@ -45,7 +45,7 @@ func infoCmdAct(cctx *cli.Context) error {
 	}
 
 	fmt.Printf("Network: %s\n", network.NetworkName)
-	fmt.Printf("StartTime: %s (started at %s)\n", time.Now().Sub(start).Truncate(time.Second), start.Truncate(time.Second))
+	fmt.Printf("StartTime: %s (started at %s)\n", time.Since(start).Truncate(time.Second), start.Truncate(time.Second))
 	fmt.Print("Chain: ")
 	err = SyncBasefeeCheck(ctx, fullapi)
 	if err != nil {
@@ -75,7 +75,7 @@ func infoCmdAct(cctx *cli.Context) error {
 		fmt.Printf("%s (check %s)\n", color.RedString("⚠ %d Active alerts", len(activeAlerts)), color.YellowString("lotus log alerts"))
 	}
 
-	//Chain health calculated as percentage: amount of blocks in last finality / very healthy amount of blocks in a finality (900 epochs * 5 blocks per tipset)
+	// Chain health calculated as percentage: amount of blocks in last finality / very healthy amount of blocks in a finality (900 epochs * 5 blocks per tipset)
 	health := (100 * (900 * status.ChainStatus.BlocksPerTipsetLastFinality) / (900 * 5))
 	switch {
 	case health > 85:
@@ -173,7 +173,6 @@ func infoCmdAct(cctx *cli.Context) error {
 		return err
 	}
 	return tw.Flush()
-
 }
 
 func SyncBasefeeCheck(ctx context.Context, fullapi v1api.FullNode) error {
@@ -186,9 +185,9 @@ func SyncBasefeeCheck(ctx context.Context, fullapi v1api.FullNode) error {
 	case time.Now().Unix()-int64(head.MinTimestamp()) < int64(buildconstants.BlockDelaySecs*3/2): // within 1.5 epochs
 		fmt.Printf("[%s]", color.GreenString("sync ok"))
 	case time.Now().Unix()-int64(head.MinTimestamp()) < int64(buildconstants.BlockDelaySecs*5): // within 5 epochs
-		fmt.Printf("[%s]", color.YellowString("sync slow (%s behind)", time.Now().Sub(time.Unix(int64(head.MinTimestamp()), 0)).Truncate(time.Second)))
+		fmt.Printf("[%s]", color.YellowString("sync slow (%s behind)", time.Since(time.Unix(int64(head.MinTimestamp()), 0)).Truncate(time.Second)))
 	default:
-		fmt.Printf("[%s]", color.RedString("sync behind! (%s behind)", time.Now().Sub(time.Unix(int64(head.MinTimestamp()), 0)).Truncate(time.Second)))
+		fmt.Printf("[%s]", color.RedString("sync behind! (%s behind)", time.Since(time.Unix(int64(head.MinTimestamp()), 0)).Truncate(time.Second)))
 	}
 	basefee := head.MinTicketBlock().ParentBaseFee
 	gasCol := []color.Attribute{color.FgBlue}
diff --git a/cmd/lotus-miner/info.go b/cmd/lotus-miner/info.go
index 9548a4a771f..cdc0cba00bf 100644
--- a/cmd/lotus-miner/info.go
+++ b/cmd/lotus-miner/info.go
@@ -81,7 +81,7 @@ func infoCmdAct(cctx *cli.Context) error {
 	if err != nil {
 		return err
 	}
-	fmt.Printf("StartTime: %s (started at %s)\n", time.Now().Sub(start).Truncate(time.Second), start.Truncate(time.Second))
+	fmt.Printf("StartTime: %s (started at %s)\n", time.Since(start).Truncate(time.Second), start.Truncate(time.Second))
 
 	fmt.Print("Chain: ")
 
@@ -135,7 +135,6 @@ func handleMiningInfo(ctx context.Context, cctx *cli.Context, fullapi v1api.Full
 
 	// Sector size
 	mi, err := fullapi.StateMinerInfo(ctx, maddr, types.EmptyTSK)
-
 	if err != nil {
 		return err
 	}
@@ -166,7 +165,6 @@ func handleMiningInfo(ctx context.Context, cctx *cli.Context, fullapi v1api.Full
 		),
 	)
 	secCounts, err := fullapi.StateMinerSectorCount(ctx, maddr, types.EmptyTSK)
-
 	if err != nil {
 		return err
 	}
@@ -267,7 +265,6 @@ func handleMiningInfo(ctx context.Context, cctx *cli.Context, fullapi v1api.Full
 	colorTokenAmount("      Available:  %s\n", availBalance)
 
 	mb, err := fullapi.StateMarketBalance(ctx, maddr, types.EmptyTSK)
-
 	if err != nil {
 		return xerrors.Errorf("getting market balance: %w", err)
 	}
@@ -278,7 +275,6 @@ func handleMiningInfo(ctx context.Context, cctx *cli.Context, fullapi v1api.Full
 	colorTokenAmount("       Available: %s\n", big.Sub(mb.Escrow, mb.Locked))
 
 	wb, err := fullapi.WalletBalance(ctx, mi.Worker)
-
 	if err != nil {
 		return xerrors.Errorf("getting worker balance: %w", err)
 	}
diff --git a/cmd/lotus-miner/proving.go b/cmd/lotus-miner/proving.go
index 79ad623d1ca..f5e4d59c0e2 100644
--- a/cmd/lotus-miner/proving.go
+++ b/cmd/lotus-miner/proving.go
@@ -239,12 +239,12 @@ It will not send any messages to the chain.`,
 
 		start := time.Now()
 		res, err := minerApi.ComputeWindowPoSt(ctx, dlIdx, types.EmptyTSK)
-		fmt.Printf("Took %s\n", time.Now().Sub(start))
+		fmt.Printf("Took %s\n", time.Since(start))
 		if err != nil {
 			return err
 		}
 
-		//convert sector information into easily readable information
+		// convert sector information into easily readable information
 		type PoStPartition struct {
 			Index   uint64
 			Skipped []uint64
diff --git a/cmd/lotus-miner/sealing.go b/cmd/lotus-miner/sealing.go
index ed2b2d2948a..6d5f4ed7cbb 100644
--- a/cmd/lotus-miner/sealing.go
+++ b/cmd/lotus-miner/sealing.go
@@ -286,7 +286,7 @@ var sealingJobsCmd = &cli.Command{
 			}
 			dur := "n/a"
 			if !l.Start.IsZero() {
-				dur = time.Now().Sub(l.Start).Truncate(time.Millisecond * 100).String()
+				dur = time.Since(l.Start).Truncate(time.Millisecond * 100).String()
 			}
 
 			hostname, ok := workerHostnames[l.wid]
diff --git a/cmd/lotus-miner/storage.go b/cmd/lotus-miner/storage.go
index b39fe2bf750..609f2ead674 100644
--- a/cmd/lotus-miner/storage.go
+++ b/cmd/lotus-miner/storage.go
@@ -351,7 +351,7 @@ var storageListCmd = &cli.Command{
 				fmt.Printf("\t%s: %s:\n", color.RedString("Error"), err)
 				continue
 			}
-			ping := time.Now().Sub(pingStart)
+			ping := time.Since(pingStart)
 
 			safeRepeat := func(s string, count int) string {
 				if count < 0 {
@@ -360,7 +360,7 @@ var storageListCmd = &cli.Command{
 				return strings.Repeat(s, count)
 			}
 
-			var barCols = int64(50)
+			barCols := int64(50)
 
 			// filesystem use bar
 			{
@@ -738,7 +738,6 @@ var storageListSectorsCmd = &cli.Command{
 				}
 
 				for _, info := range si {
-
 					list = append(list, entry{
 						id:      sector,
 						storage: info.ID,
diff --git a/miner/warmup.go b/miner/warmup.go
index 46236784a72..1bfe79b6cf6 100644
--- a/miner/warmup.go
+++ b/miner/warmup.go
@@ -84,7 +84,7 @@ out:
 		return xerrors.Errorf("failed to compute proof: %w", err)
 	}
 
-	log.Infow("winning PoSt warmup successful", "took", time.Now().Sub(start))
+	log.Infow("winning PoSt warmup successful", "took", time.Since(start))
 	return nil
 }
 
diff --git a/storage/paths/fetch.go b/storage/paths/fetch.go
index 6b87c0dd90d..5f57e3e14a2 100644
--- a/storage/paths/fetch.go
+++ b/storage/paths/fetch.go
@@ -37,7 +37,7 @@ func fetch(ctx context.Context, url, outname string, header http.Header) (rerr e
 	start := time.Now()
 	var bytes int64
 	defer func() {
-		took := time.Now().Sub(start)
+		took := time.Since(start)
 		mibps := float64(bytes) / 1024 / 1024 * float64(time.Second) / float64(took)
 		log.Infow("Fetch done", "url", url, "out", outname, "took", took.Round(time.Millisecond), "bytes", bytes, "MiB/s", mibps, "err", rerr)
 	}()
diff --git a/storage/paths/local.go b/storage/paths/local.go
index 07223ad5317..ef206edb88e 100644
--- a/storage/paths/local.go
+++ b/storage/paths/local.go
@@ -144,7 +144,7 @@ func (p *path) stat(ls LocalStorage, newReserve ...statExistingSectorForReservat
 	}
 
 	if stat.Reserved < 0 {
-		//log.Warnf("negative reserved storage: p.reserved=%d, reserved: %d", p.reserved, stat.Reserved)
+		// log.Warnf("negative reserved storage: p.reserved=%d, reserved: %d", p.reserved, stat.Reserved)
 		var jsonReservations []map[string]interface{}
 		for id, res := range p.reservations {
 			jsonReservations = append(jsonReservations, map[string]interface{}{
@@ -182,8 +182,8 @@ func (p *path) stat(ls LocalStorage, newReserve ...statExistingSectorForReservat
 		}
 	}
 
-	if time.Now().Sub(start) > 5*time.Second {
-		log.Warnw("slow storage stat", "took", time.Now().Sub(start), "reservations", len(p.reservations))
+	if took := time.Since(start); took > 5*time.Second {
+		log.Warnw("slow storage stat", "took", took, "reservations", len(p.reservations))
 	}
 
 	return stat, newReserveOnDisk, err
@@ -463,7 +463,8 @@ func (st *Local) reportStorage(ctx context.Context) {
 }
 
 func (st *Local) Reserve(ctx context.Context, sid storiface.SectorRef, ft storiface.SectorFileType,
-	storageIDs storiface.SectorPaths, overheadTab map[storiface.SectorFileType]int, minFreePercentage float64) (func(), error) {
+	storageIDs storiface.SectorPaths, overheadTab map[storiface.SectorFileType]int, minFreePercentage float64,
+) (func(), error) {
 	ssize, err := sid.ProofType.SectorSize()
 	if err != nil {
 		return nil, err
@@ -661,7 +662,6 @@ func (st *Local) AcquireSector(ctx context.Context, sid storiface.SectorRef, exi
 			}
 
 			alloc, err := allocPathOk(si.CanSeal, si.CanStore, si.AllowTypes, si.DenyTypes, si.AllowMiners, si.DenyMiners, fileType, sid.ID.Miner)
-
 			if err != nil {
 				log.Debug(err)
 				continue
@@ -950,7 +950,7 @@ func (st *Local) GenerateSingleVanillaProof(ctx context.Context, minerID abi.Act
 	case r := <-resCh:
 		return r.Unwrap()
 	case <-ctx.Done():
-		log.Errorw("failed to generate valilla PoSt proof before context cancellation", "err", ctx.Err(), "duration", time.Now().Sub(start), "cache-id", cacheID, "sealed-id", sealedID, "cache", cache, "sealed", sealed)
+		log.Errorw("failed to generate valilla PoSt proof before context cancellation", "err", ctx.Err(), "duration", time.Since(start), "cache-id", cacheID, "sealed-id", sealedID, "cache", cache, "sealed", sealed)
 
 		// this will leave the GenerateSingleVanillaProof goroutine hanging, but that's still less bad than failing PoSt
 		return nil, xerrors.Errorf("failed to generate vanilla proof before context cancellation: %w", ctx.Err())
diff --git a/storage/paths/localstorage_cached.go b/storage/paths/localstorage_cached.go
index 31e2528ffc0..f791384cb43 100644
--- a/storage/paths/localstorage_cached.go
+++ b/storage/paths/localstorage_cached.go
@@ -11,8 +11,10 @@ import (
 	"github.com/filecoin-project/lotus/storage/sealer/storiface"
 )
 
-var StatTimeout = 5 * time.Second
-var MaxDiskUsageDuration = time.Second
+var (
+	StatTimeout          = 5 * time.Second
+	MaxDiskUsageDuration = time.Second
+)
 
 type cachedLocalStorage struct {
 	base LocalStorage
@@ -61,7 +63,7 @@ func (c *cachedLocalStorage) Stat(path string) (fsutil.FsStat, error) {
 	c.statLk.Lock()
 	defer c.statLk.Unlock()
 
-	if v, ok := c.stats.Get(path); ok && time.Now().Sub(v.time) < StatTimeout {
+	if v, ok := c.stats.Get(path); ok && time.Since(v.time) < StatTimeout {
 		return v.stat, nil
 	}
 
@@ -87,7 +89,7 @@ func (c *cachedLocalStorage) DiskUsage(path string) (int64, error) {
 		entry = v
 
 		// if we have recent cached entry, use that
-		if time.Now().Sub(entry.last.time) < StatTimeout {
+		if time.Since(entry.last.time) < StatTimeout {
 			return entry.last.usage, nil
 		}
 	} else {
@@ -126,7 +128,7 @@ func (c *cachedLocalStorage) DiskUsage(path string) (int64, error) {
 		log.Warnw("getting usage is slow, falling back to previous usage",
 			"path", path,
 			"fallback", entry.last.usage,
-			"age", time.Now().Sub(entry.last.time))
+			"age", time.Since(entry.last.time))
 	}
 
 	return entry.last.usage, nil
diff --git a/storage/sealer/fsutil/filesize_unix.go b/storage/sealer/fsutil/filesize_unix.go
index 3d80e0b8a24..8cc33961a78 100644
--- a/storage/sealer/fsutil/filesize_unix.go
+++ b/storage/sealer/fsutil/filesize_unix.go
@@ -39,8 +39,8 @@ func FileSize(path string) (SizeInfo, error) {
 		return err
 	})
 
-	if time.Now().Sub(start) >= 3*time.Second {
-		log.Warnw("very slow file size check", "took", time.Now().Sub(start), "path", path)
+	if took := time.Since(start); took >= 3*time.Second {
+		log.Warnw("very slow file size check", "took", took, "path", path)
 	}
 
 	if err != nil {
diff --git a/storage/wdpost/wdpost_run.go b/storage/wdpost/wdpost_run.go
index efb43ddd247..11eff7ee3a2 100644
--- a/storage/wdpost/wdpost_run.go
+++ b/storage/wdpost/wdpost_run.go
@@ -117,7 +117,6 @@ func (s *WindowPoStScheduler) startSubmitPoST(
 	posts []miner.SubmitWindowedPoStParams,
 	completeSubmitPoST CompleteSubmitPoSTCb,
 ) context.CancelFunc {
-
 	ctx, abort := context.WithCancel(ctx)
 	go func() {
 		defer abort()
@@ -276,7 +275,7 @@ func (s *WindowPoStScheduler) runPoStCycle(ctx context.Context, manual bool, di
 	log := log.WithOptions(zap.Fields(zap.Time("cycle", start)))
 	log.Infow("starting PoSt cycle", "manual", manual, "ts", ts, "deadline", di.Index)
 	defer func() {
-		log.Infow("post cycle done", "took", time.Now().Sub(start))
+		log.Infow("post cycle done", "took", time.Since(start))
 	}()
 
 	if !manual {
diff --git a/tools/stats/points/collect.go b/tools/stats/points/collect.go
index 6f030fdb7c0..8ad698e739b 100644
--- a/tools/stats/points/collect.go
+++ b/tools/stats/points/collect.go
@@ -81,7 +81,7 @@ func (c *ChainPointCollector) Collect(ctx context.Context, tipset *types.TipSet)
 	start := time.Now()
 	done := metrics.Timer(ctx, metrics.TipsetCollectionDuration)
 	defer func() {
-		log.Infow("record tipset", "elapsed", time.Now().Sub(start).Seconds())
+		log.Infow("record tipset", "elapsed", time.Since(start).Seconds())
 		done()
 	}()
 
@@ -126,7 +126,7 @@ func (c *ChainPointCollector) collectBlockheaderPoints(ctx context.Context, pl *
 	start := time.Now()
 	done := metrics.Timer(ctx, metrics.TipsetCollectionBlockHeaderDuration)
 	defer func() {
-		log.Infow("collect blockheader points", "elapsed", time.Now().Sub(start).Seconds())
+		log.Infow("collect blockheader points", "elapsed", time.Since(start).Seconds())
 		done()
 	}()
 
@@ -218,7 +218,7 @@ func (c *ChainPointCollector) collectStaterootPoints(ctx context.Context, pl *in
 	start := time.Now()
 	done := metrics.Timer(ctx, metrics.TipsetCollectionStaterootDuration)
 	defer func() {
-		log.Infow("collect stateroot points", "elapsed", time.Now().Sub(start).Seconds())
+		log.Infow("collect stateroot points", "elapsed", time.Since(start).Seconds())
 		done()
 	}()
 
@@ -280,7 +280,7 @@ func (c *ChainPointCollector) collectMessagePoints(ctx context.Context, pl *infl
 	start := time.Now()
 	done := metrics.Timer(ctx, metrics.TipsetCollectionMessageDuration)
 	defer func() {
-		log.Infow("collect message points", "elapsed", time.Now().Sub(start).Seconds())
+		log.Infow("collect message points", "elapsed", time.Since(start).Seconds())
 		done()
 	}()