diff --git a/Makefile b/Makefile
index 138c56c..b700ab0 100644
--- a/Makefile
+++ b/Makefile
@@ -30,6 +30,8 @@ endif
 
 export CGO_ENABLED ?= 0
 BUILD_PKG = ./cmd/catp
+BUILD_LDFLAGS=-s -w
+BUILD_FLAGS=-trimpath -pgo=./cmd/catp.pgo
 
 -include $(DEVGO_PATH)/makefiles/main.mk
 -include $(DEVGO_PATH)/makefiles/lint.mk
@@ -39,5 +41,3 @@ BUILD_PKG = ./cmd/catp
 
 # Add your custom targets here.
 
-## Run tests
-test: test-unit
diff --git a/cmd/catp.pgo b/cmd/catp.pgo
new file mode 100644
index 0000000..6b2dfdf
Binary files /dev/null and b/cmd/catp.pgo differ
diff --git a/cmd/catp/main.go b/cmd/catp/main.go
index 0cb8cdb..0289a84 100644
--- a/cmd/catp/main.go
+++ b/cmd/catp/main.go
@@ -2,18 +2,19 @@ package main
 
 import (
 	"bufio"
+	"bytes"
 	"flag"
 	"fmt"
 	"io"
 	"log"
 	"os"
+	"runtime/pprof"
 	"strings"
 	"time"
 
 	"github.com/bool64/progress"
 	"github.com/klauspost/compress/zstd"
 	gzip "github.com/klauspost/pgzip"
-	_ "gitlab.com/rackn/seekable-zstd"
 )
 
 type runner struct {
@@ -22,6 +23,9 @@ type runner struct {
 	readBytes  int64
 	totalBytes int64
 
+	grep    [][]byte
+	reverse bool
+
 	currentFile  *progress.CountingReader
 	currentTotal int64
 }
@@ -44,15 +48,34 @@ func (r *runner) st(s progress.ProgressStatus) string {
 	return res
 }
 
-func readFile(r io.Reader) {
-	rd := bufio.NewReader(r)
+func (r *runner) readFile(rd io.Reader) {
+	b := bufio.NewReaderSize(rd, 64*1024)
 
-	_, err := io.Copy(os.Stdout, rd)
+	_, err := io.Copy(os.Stdout, b)
 	if err != nil {
 		log.Fatal(err)
 	}
 }
 
+func (r *runner) scanFile(rd io.Reader) {
+	s := bufio.NewScanner(rd)
+	s.Buffer(make([]byte, 64*1024), 10*1024*1024)
+
+	for s.Scan() {
+		for _, g := range r.grep {
+			if bytes.Contains(s.Bytes(), g) {
+				_, _ = os.Stdout.Write(s.Bytes())
+
+				break
+			}
+		}
+	}
+
+	if err := s.Err(); err != nil {
+		log.Fatal(err)
+	}
+}
+
 func (r *runner) cat(filename string) {
 	file, err := os.Open(filename)
 	if err != nil {
@@ -75,6 +98,10 @@ func (r *runner) cat(filename string) {
 		}
 	}
 
+	if r.reverse {
+
+	}
+
 	r.pr.Start(func(t *progress.Task) {
 		t.TotalBytes = func() int64 {
 			return r.totalBytes
@@ -86,16 +113,49 @@ func (r *runner) cat(filename string) {
 		t.Task = filename
 		t.Continue = true
 	})
-	readFile(rd)
+
+	if len(r.grep) > 0 || r.reverse {
+		r.scanFile(rd)
+	} else {
+		r.readFile(rd)
+	}
 
 	r.pr.Stop()
 	r.readBytes += r.currentFile.Bytes()
 }
 
 func main() {
+	grep := flag.String("grep", "", "grep pattern, may contain multiple patterns separated by \\|")
+	cpuProfile := flag.String("dbg-cpu-prof", "", "write first 10 seconds of CPU profile to file")
+
 	flag.Parse()
 
+	if *cpuProfile != "" {
+		f, err := os.Create(*cpuProfile) //nolint:gosec
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		if err = pprof.StartCPUProfile(f); err != nil {
+			log.Fatal(err)
+		}
+
+		go func() {
+			time.Sleep(10 * time.Second)
+			pprof.StopCPUProfile()
+			println("CPU profile written to", *cpuProfile)
+		}()
+	}
+
 	r := &runner{}
+	r.reverse = *reverse
+
+	if *grep != "" {
+		for _, s := range strings.Split(*grep, "\\|") {
+			r.grep = append(r.grep, []byte(s))
+		}
+	}
+
 	r.sizes = make(map[string]int64)
 	r.pr = &progress.Progress{
 		Interval: 5 * time.Second,
diff --git a/cmd/go.mod b/cmd/go.mod
index 325c620..192ac1a 100644
--- a/cmd/go.mod
+++ b/cmd/go.mod
@@ -6,10 +6,4 @@ require (
 	github.com/bool64/progress v0.1.0
 	github.com/klauspost/compress v1.16.5
 	github.com/klauspost/pgzip v1.2.5
-	gitlab.com/rackn/seekable-zstd v0.8.1
-)
-
-require (
-	github.com/cespare/xxhash/v2 v2.2.0 // indirect
-	gitlab.com/rackn/simplecache v0.0.0-20230324193231-44368de53d93 // indirect
 )
diff --git a/cmd/go.sum b/cmd/go.sum
index f1bf79a..d4b1c79 100644
--- a/cmd/go.sum
+++ b/cmd/go.sum
@@ -1,17 +1,7 @@
 github.com/bool64/dev v0.2.27 h1:mFT+B74mFVgUeUmm/EbfM6ELPA55lEXBjQ/AOHCwCOc=
 github.com/bool64/progress v0.1.0 h1:khsGInrTrQMyskfcRTE9gP982koSqKobYFJ977JLxhA=
 github.com/bool64/progress v0.1.0/go.mod h1:XwIA2+r2sEKxIRa6TFR0FqD3GHt0wz4dk4IL5CwbuKo=
-github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
-github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/klauspost/compress v1.16.5 h1:IFV2oUNUzZaz+XyusxpLzpzS8Pt5rh0Z16For/djlyI=
 github.com/klauspost/compress v1.16.5/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
 github.com/klauspost/pgzip v1.2.5 h1:qnWYvvKqedOF2ulHpMG72XQol4ILEJ8k2wwRl/Km8oE=
 github.com/klauspost/pgzip v1.2.5/go.mod h1:Ch1tH69qFZu15pkjo5kYi6mth2Zzwzt50oCQKQE9RUs=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/stretchr/testify v1.7.2 h1:4jaiDzPyXQvSd7D0EjG45355tLlV3VOECpq10pLC+8s=
-gitlab.com/rackn/seekable-zstd v0.8.1 h1:vemYjUK3hr1uSipdVQGKX/SOOlWUr1kXTfjfgLfCPVE=
-gitlab.com/rackn/seekable-zstd v0.8.1/go.mod h1:9z8nf3qNXOi73VRm7KQgTmI3T0tz9YzDKKL7fzEBz9M=
-gitlab.com/rackn/simplecache v0.0.0-20230324193231-44368de53d93 h1:lXoXk/e9YrtTyWzNZs1ak/ijpwZQDaJLEwKCjhp/dCw=
-gitlab.com/rackn/simplecache v0.0.0-20230324193231-44368de53d93/go.mod h1:pXhP0EyrEy0pGf2DW4vTKub/As/UiamLFaZ1Q9YaFTs=
-gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=