diff --git a/internal/commands/run.go b/internal/commands/run.go
index 90d1d638d62b..95d59163b5bc 100644
--- a/internal/commands/run.go
+++ b/internal/commands/run.go
@@ -228,6 +228,7 @@ func (e *Executor) runAnalysis(ctx context.Context, args []string) (chan result.
 	}
 	runner := pkg.SimpleRunner{
 		Processors: []processors.Processor{
+			processors.NewPathPrettifier(), // must be before diff processor at least
 			processors.NewExclude(excludeTotalPattern),
 			processors.NewCgo(),
 			processors.NewNolint(fset),
@@ -236,7 +237,6 @@ func (e *Executor) runAnalysis(ctx context.Context, args []string) (chan result.
 			processors.NewMaxPerFileFromLinter(),
 			processors.NewMaxSameIssues(e.cfg.Issues.MaxSameIssues),
 			processors.NewMaxFromLinter(e.cfg.Issues.MaxIssuesPerLinter),
-			processors.NewPathPrettifier(),
 		},
 	}
 
diff --git a/pkg/enabled_linters.go b/pkg/enabled_linters.go
index 0f577070f86e..5de4ca049c70 100644
--- a/pkg/enabled_linters.go
+++ b/pkg/enabled_linters.go
@@ -2,6 +2,7 @@ package pkg
 
 import (
 	"fmt"
+	"os"
 	"strings"
 	"sync"
 
@@ -55,15 +56,9 @@ func (lc LinterConfig) WithPresets(presets ...string) LinterConfig {
 	return lc
 }
 
-func (lc LinterConfig) WithDisabledByDefault() LinterConfig {
-	lc.EnabledByDefault = false
-	return lc
-}
-
 func newLinterConfig(linter Linter) LinterConfig {
 	return LinterConfig{
-		Linter:           linter,
-		EnabledByDefault: true,
+		Linter: linter,
 	}
 }
 
@@ -86,11 +81,21 @@ func GetLinterConfig(name string) *LinterConfig {
 	return &lc
 }
 
+func enableLinterConfigs(lcs []LinterConfig, isEnabled func(lc *LinterConfig) bool) []LinterConfig {
+	var ret []LinterConfig
+	for _, lc := range lcs {
+		lc.EnabledByDefault = isEnabled(&lc)
+		ret = append(ret, lc)
+	}
+
+	return ret
+}
+
 func GetAllSupportedLinterConfigs() []LinterConfig {
-	return []LinterConfig{
+	lcs := []LinterConfig{
 		newLinterConfig(golinters.Govet{}).WithPresets(PresetBugs),
 		newLinterConfig(golinters.Errcheck{}).WithFullImport().WithPresets(PresetBugs),
-		newLinterConfig(golinters.Golint{}).WithDisabledByDefault().WithPresets(PresetStyle),
+		newLinterConfig(golinters.Golint{}).WithPresets(PresetStyle),
 
 		newLinterConfig(golinters.Megacheck{StaticcheckEnabled: true}).WithSSA().WithPresets(PresetBugs),
 		newLinterConfig(golinters.Megacheck{UnusedEnabled: true}).WithSSA().WithPresets(PresetUnused),
@@ -99,20 +104,47 @@ func GetAllSupportedLinterConfigs() []LinterConfig {
 		newLinterConfig(golinters.Gas{}).WithFullImport().WithPresets(PresetBugs),
 		newLinterConfig(golinters.Structcheck{}).WithFullImport().WithPresets(PresetUnused),
 		newLinterConfig(golinters.Varcheck{}).WithFullImport().WithPresets(PresetUnused),
-		newLinterConfig(golinters.Interfacer{}).WithDisabledByDefault().WithSSA().WithPresets(PresetStyle),
-		newLinterConfig(golinters.Unconvert{}).WithDisabledByDefault().WithFullImport().WithPresets(PresetStyle),
+		newLinterConfig(golinters.Interfacer{}).WithSSA().WithPresets(PresetStyle),
+		newLinterConfig(golinters.Unconvert{}).WithFullImport().WithPresets(PresetStyle),
 		newLinterConfig(golinters.Ineffassign{}).WithPresets(PresetUnused),
-		newLinterConfig(golinters.Dupl{}).WithDisabledByDefault().WithPresets(PresetStyle),
-		newLinterConfig(golinters.Goconst{}).WithDisabledByDefault().WithPresets(PresetStyle),
+		newLinterConfig(golinters.Dupl{}).WithPresets(PresetStyle),
+		newLinterConfig(golinters.Goconst{}).WithPresets(PresetStyle),
 		newLinterConfig(golinters.Deadcode{}).WithFullImport().WithPresets(PresetUnused),
-		newLinterConfig(golinters.Gocyclo{}).WithDisabledByDefault().WithPresets(PresetComplexity),
+		newLinterConfig(golinters.Gocyclo{}).WithPresets(PresetComplexity),
 
-		newLinterConfig(golinters.Gofmt{}).WithDisabledByDefault().WithPresets(PresetFormatting),
-		newLinterConfig(golinters.Gofmt{UseGoimports: true}).WithDisabledByDefault().WithPresets(PresetFormatting),
-		newLinterConfig(golinters.Maligned{}).WithFullImport().WithDisabledByDefault().WithPresets(PresetPerformance),
+		newLinterConfig(golinters.Gofmt{}).WithPresets(PresetFormatting),
+		newLinterConfig(golinters.Gofmt{UseGoimports: true}).WithPresets(PresetFormatting),
+		newLinterConfig(golinters.Maligned{}).WithFullImport().WithPresets(PresetPerformance),
 		newLinterConfig(golinters.Megacheck{GosimpleEnabled: true, UnusedEnabled: true, StaticcheckEnabled: true}).
-			WithSSA().WithPresets(PresetStyle, PresetBugs, PresetUnused).WithDisabledByDefault(),
+			WithSSA().WithPresets(PresetStyle, PresetBugs, PresetUnused),
+	}
+
+	if os.Getenv("GOLANGCI_COM_RUN") == "1" {
+		disabled := map[string]bool{
+			"gocyclo":  true,
+			"dupl":     true,
+			"maligned": true,
+		}
+		return enableLinterConfigs(lcs, func(lc *LinterConfig) bool {
+			return !disabled[lc.Linter.Name()]
+		})
 	}
+
+	enabled := map[string]bool{
+		"govet":       true,
+		"errcheck":    true,
+		"staticcheck": true,
+		"unused":      true,
+		"gosimple":    true,
+		"gas":         true,
+		"structcheck": true,
+		"varcheck":    true,
+		"ineffassign": true,
+		"deadcode":    true,
+	}
+	return enableLinterConfigs(lcs, func(lc *LinterConfig) bool {
+		return enabled[lc.Linter.Name()]
+	})
 }
 
 func getAllSupportedLinters() []Linter {
diff --git a/pkg/result/processors/diff.go b/pkg/result/processors/diff.go
index 67c1d6eac6b0..d6c0cc789847 100644
--- a/pkg/result/processors/diff.go
+++ b/pkg/result/processors/diff.go
@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"os"
+	"strings"
 
 	"github.com/golangci/golangci-lint/pkg/result"
 	"github.com/golangci/revgrep"
@@ -14,6 +16,7 @@ type Diff struct {
 	onlyNew       bool
 	fromRev       string
 	patchFilePath string
+	patch         string
 }
 
 var _ Processor = Diff{}
@@ -23,6 +26,7 @@ func NewDiff(onlyNew bool, fromRev, patchFilePath string) *Diff {
 		onlyNew:       onlyNew,
 		fromRev:       fromRev,
 		patchFilePath: patchFilePath,
+		patch:         os.Getenv("GOLANGCI_DIFF_PROCESSOR_PATCH"),
 	}
 }
 
@@ -31,7 +35,7 @@ func (p Diff) Name() string {
 }
 
 func (p Diff) Process(issues []result.Issue) ([]result.Issue, error) {
-	if !p.onlyNew && p.fromRev == "" && p.patchFilePath == "" { // no need to work
+	if !p.onlyNew && p.fromRev == "" && p.patchFilePath == "" && p.patch == "" { // no need to work
 		return issues, nil
 	}
 
@@ -42,7 +46,10 @@ func (p Diff) Process(issues []result.Issue) ([]result.Issue, error) {
 			return nil, fmt.Errorf("can't read from pathc file %s: %s", p.patchFilePath, err)
 		}
 		patchReader = bytes.NewReader(patch)
+	} else if p.patch != "" {
+		patchReader = strings.NewReader(p.patch)
 	}
+
 	c := revgrep.Checker{
 		Patch:        patchReader,
 		RevisionFrom: p.fromRev,
diff --git a/pkg/runner.go b/pkg/runner.go
index e57c185a296a..978d251bd37a 100644
--- a/pkg/runner.go
+++ b/pkg/runner.go
@@ -145,7 +145,8 @@ func (r *SimpleRunner) processIssues(ctx context.Context, issues []result.Issue)
 		newIssues, err := p.Process(issues)
 		elapsed := time.Since(startedAt)
 		if elapsed > 50*time.Millisecond {
-			logrus.Infof("Result processor %s took %s", p.Name(), elapsed)
+			logrus.Infof("Result processor %s took %s and transformed %d -> %d issues",
+				p.Name(), elapsed, len(issues), len(newIssues))
 		}
 		if err != nil {
 			logrus.Warnf("Can't process result by %s processor: %s", p.Name(), err)