diff --git a/cli/compile/compile.go b/cli/compile/compile.go
index 6f62f5f5267..8f1ab072a46 100644
--- a/cli/compile/compile.go
+++ b/cli/compile/compile.go
@@ -48,6 +48,7 @@ var (
 	verify             bool     // Upload, verify uploaded binary after the upload.
 	exportFile         string   // The compiled binary is written to this file
 	libraries          []string // List of custom libraries paths separated by commas. Or can be used multiple times for multiple libraries paths.
+	optimizeForDebug   bool     // Optimize compile output for debug, not for release
 )
 
 // NewCommand created a new `compile` command
@@ -80,6 +81,7 @@ func NewCommand() *cobra.Command {
 	command.Flags().StringVar(&vidPid, "vid-pid", "", "When specified, VID/PID specific build properties are used, if boards supports them.")
 	command.Flags().StringSliceVar(&libraries, "libraries", []string{},
 		"List of custom libraries paths separated by commas. Or can be used multiple times for multiple libraries paths.")
+	command.Flags().BoolVar(&optimizeForDebug, "optimize-for-debug", false, "Optional, optimize compile output for debug, not for release.")
 
 	return command
 }
@@ -99,20 +101,21 @@ func run(cmd *cobra.Command, args []string) {
 	sketchPath := initSketchPath(path)
 
 	_, err = compile.Compile(context.Background(), &rpc.CompileReq{
-		Instance:        inst,
-		Fqbn:            fqbn,
-		SketchPath:      sketchPath.String(),
-		ShowProperties:  showProperties,
-		Preprocess:      preprocess,
-		BuildCachePath:  buildCachePath,
-		BuildPath:       buildPath,
-		BuildProperties: buildProperties,
-		Warnings:        warnings,
-		Verbose:         verbose,
-		Quiet:           quiet,
-		VidPid:          vidPid,
-		ExportFile:      exportFile,
-		Libraries:       libraries,
+		Instance:         inst,
+		Fqbn:             fqbn,
+		SketchPath:       sketchPath.String(),
+		ShowProperties:   showProperties,
+		Preprocess:       preprocess,
+		BuildCachePath:   buildCachePath,
+		BuildPath:        buildPath,
+		BuildProperties:  buildProperties,
+		Warnings:         warnings,
+		Verbose:          verbose,
+		Quiet:            quiet,
+		VidPid:           vidPid,
+		ExportFile:       exportFile,
+		Libraries:        libraries,
+		OptimizeForDebug: optimizeForDebug,
 	}, os.Stdout, os.Stderr, viper.GetString("logging.level") == "debug")
 
 	if err != nil {
diff --git a/commands/compile/compile.go b/commands/compile/compile.go
index a03a0b01c5d..e00398abed0 100644
--- a/commands/compile/compile.go
+++ b/commands/compile/compile.go
@@ -103,6 +103,9 @@ func Compile(ctx context.Context, req *rpc.CompileReq, outStream, errStream io.W
 
 	builderCtx.Verbose = req.GetVerbose()
 
+	// Optimize for debug
+	builderCtx.OptimizeForDebug = req.GetOptimizeForDebug()
+
 	builderCtx.CoreBuildCachePath = paths.TempDir().Join("arduino-core-cache")
 
 	builderCtx.Jobs = int(req.GetJobs())
diff --git a/legacy/builder/builder_utils/utils.go b/legacy/builder/builder_utils/utils.go
index 7ebc86f2d21..c8f0ffefd89 100644
--- a/legacy/builder/builder_utils/utils.go
+++ b/legacy/builder/builder_utils/utils.go
@@ -519,20 +519,3 @@ func PrepareCommandForRecipe(ctx *types.Context, buildProperties *properties.Map
 
 	return command, nil
 }
-
-// GetCachedCoreArchiveFileName returns the filename to be used to store
-// the global cached core.a.
-func GetCachedCoreArchiveFileName(fqbn string, coreFolder *paths.Path) string {
-	fqbnToUnderscore := strings.Replace(fqbn, ":", "_", -1)
-	fqbnToUnderscore = strings.Replace(fqbnToUnderscore, "=", "_", -1)
-	if absCoreFolder, err := coreFolder.Abs(); err == nil {
-		coreFolder = absCoreFolder
-	} // silently continue if absolute path can't be detected
-	hash := utils.MD5Sum([]byte(coreFolder.String()))
-	realName := "core_" + fqbnToUnderscore + "_" + hash + ".a"
-	if len(realName) > 100 {
-		// avoid really long names, simply hash the final part
-		realName = "core_" + utils.MD5Sum([]byte(fqbnToUnderscore+"_"+hash)) + ".a"
-	}
-	return realName
-}
diff --git a/legacy/builder/create_build_options_map.go b/legacy/builder/create_build_options_map.go
index 8583d374a05..b9de9b0cc45 100644
--- a/legacy/builder/create_build_options_map.go
+++ b/legacy/builder/create_build_options_map.go
@@ -17,7 +17,6 @@ package builder
 
 import (
 	"encoding/json"
-
 	"github.com/arduino/arduino-cli/legacy/builder/i18n"
 	"github.com/arduino/arduino-cli/legacy/builder/types"
 )
@@ -30,7 +29,6 @@ func (s *CreateBuildOptionsMap) Run(ctx *types.Context) error {
 	if err != nil {
 		return i18n.WrapError(err)
 	}
-
 	ctx.BuildOptionsJson = string(bytes)
 
 	return nil
diff --git a/legacy/builder/phases/core_builder.go b/legacy/builder/phases/core_builder.go
index bf178652e37..846fd30dbb6 100644
--- a/legacy/builder/phases/core_builder.go
+++ b/legacy/builder/phases/core_builder.go
@@ -17,6 +17,7 @@ package phases
 
 import (
 	"os"
+	"strings"
 
 	"github.com/arduino/arduino-cli/legacy/builder/builder_utils"
 	"github.com/arduino/arduino-cli/legacy/builder/constants"
@@ -90,7 +91,8 @@ func compileCore(ctx *types.Context, buildPath *paths.Path, buildCachePath *path
 
 	var targetArchivedCore *paths.Path
 	if buildCachePath != nil {
-		archivedCoreName := builder_utils.GetCachedCoreArchiveFileName(buildProperties.Get(constants.BUILD_PROPERTIES_FQBN), realCoreFolder)
+		archivedCoreName := GetCachedCoreArchiveFileName(buildProperties.Get(constants.BUILD_PROPERTIES_FQBN),
+			buildProperties.Get("compiler.optimization_flags"), realCoreFolder)
 		targetArchivedCore = buildCachePath.Join(archivedCoreName)
 		canUseArchivedCore := !builder_utils.CoreOrReferencedCoreHasChanged(realCoreFolder, targetCoreFolder, targetArchivedCore)
 
@@ -129,3 +131,20 @@ func compileCore(ctx *types.Context, buildPath *paths.Path, buildCachePath *path
 
 	return archiveFile, variantObjectFiles, nil
 }
+
+// GetCachedCoreArchiveFileName returns the filename to be used to store
+// the global cached core.a.
+func GetCachedCoreArchiveFileName(fqbn string, optimizationFlags string, coreFolder *paths.Path) string {
+	fqbnToUnderscore := strings.Replace(fqbn, ":", "_", -1)
+	fqbnToUnderscore = strings.Replace(fqbnToUnderscore, "=", "_", -1)
+	if absCoreFolder, err := coreFolder.Abs(); err == nil {
+		coreFolder = absCoreFolder
+	} // silently continue if absolute path can't be detected
+	hash := utils.MD5Sum([]byte(coreFolder.String() + optimizationFlags))
+	realName := "core_" + fqbnToUnderscore + "_" + hash + ".a"
+	if len(realName) > 100 {
+		// avoid really long names, simply hash the final part
+		realName = "core_" + utils.MD5Sum([]byte(fqbnToUnderscore+"_"+hash)) + ".a"
+	}
+	return realName
+}
diff --git a/legacy/builder/setup_build_properties.go b/legacy/builder/setup_build_properties.go
index e23a697363e..a69ae5099a5 100644
--- a/legacy/builder/setup_build_properties.go
+++ b/legacy/builder/setup_build_properties.go
@@ -69,6 +69,17 @@ func (s *SetupBuildProperties) Run(ctx *types.Context) error {
 	buildProperties.Set("ide_version", ctx.ArduinoAPIVersion)
 	buildProperties.Set("runtime.os", utils.PrettyOSName())
 
+	if ctx.OptimizeForDebug {
+		if buildProperties.ContainsKey("compiler.optimization_flags.debug") {
+			buildProperties.Set("compiler.optimization_flags", buildProperties.Get("compiler.optimization_flags.debug"))
+		}
+	} else {
+		if buildProperties.ContainsKey("compiler.optimization_flags.release") {
+			buildProperties.Set("compiler.optimization_flags", buildProperties.Get("compiler.optimization_flags.release"))
+		}
+	}
+	ctx.OptimizationFlags = buildProperties.Get("compiler.optimization_flags")
+
 	variant := buildProperties.Get("build.variant")
 	if variant == "" {
 		buildProperties.Set("build.variant.path", "")
diff --git a/legacy/builder/test/builder_test.go b/legacy/builder/test/builder_test.go
index a8c8f078d39..351b3a6c8d6 100644
--- a/legacy/builder/test/builder_test.go
+++ b/legacy/builder/test/builder_test.go
@@ -24,8 +24,8 @@ import (
 	"github.com/arduino/go-paths-helper"
 
 	"github.com/arduino/arduino-cli/legacy/builder"
-	"github.com/arduino/arduino-cli/legacy/builder/builder_utils"
 	"github.com/arduino/arduino-cli/legacy/builder/constants"
+	"github.com/arduino/arduino-cli/legacy/builder/phases"
 	"github.com/arduino/arduino-cli/legacy/builder/types"
 	"github.com/stretchr/testify/require"
 )
@@ -379,7 +379,7 @@ func TestBuilderCacheCoreAFile(t *testing.T) {
 
 	// Pick timestamp of cached core
 	coreFolder := paths.New("downloaded_hardware", "arduino", "avr")
-	coreFileName := builder_utils.GetCachedCoreArchiveFileName(ctx.FQBN.String(), coreFolder)
+	coreFileName := phases.GetCachedCoreArchiveFileName(ctx.FQBN.String(), ctx.OptimizationFlags, coreFolder)
 	cachedCoreFile := ctx.CoreBuildCachePath.Join(coreFileName)
 	coreStatBefore, err := cachedCoreFile.Stat()
 	require.NoError(t, err)
diff --git a/legacy/builder/test/create_build_options_map_test.go b/legacy/builder/test/create_build_options_map_test.go
index d7024d47689..3abb60eca0a 100644
--- a/legacy/builder/test/create_build_options_map_test.go
+++ b/legacy/builder/test/create_build_options_map_test.go
@@ -35,6 +35,7 @@ func TestCreateBuildOptionsMap(t *testing.T) {
 		Verbose:            true,
 		BuildPath:          paths.New("buildPath"),
 		DebugLevel:         5,
+		OptimizationFlags:  "-Os",
 	}
 
 	create := builder.CreateBuildOptionsMap{}
@@ -45,6 +46,7 @@ func TestCreateBuildOptionsMap(t *testing.T) {
   "additionalFiles": "",
   "builtInLibrariesFolders": "",
   "builtInToolsFolders": "tools",
+  "compiler.optimization_flags": "-Os",
   "customBuildProperties": "",
   "fqbn": "my:nice:fqbn",
   "hardwareFolders": "hardware,hardware2",
diff --git a/legacy/builder/test/store_build_options_map_test.go b/legacy/builder/test/store_build_options_map_test.go
index 82b555c403f..f3aa0b7ba79 100644
--- a/legacy/builder/test/store_build_options_map_test.go
+++ b/legacy/builder/test/store_build_options_map_test.go
@@ -37,6 +37,7 @@ func TestStoreBuildOptionsMap(t *testing.T) {
 		CustomBuildProperties: []string{"custom=prop"},
 		Verbose:               true,
 		DebugLevel:            5,
+		OptimizationFlags:     "-Os",
 	}
 
 	buildPath := SetupBuildPath(t, ctx)
@@ -63,6 +64,7 @@ func TestStoreBuildOptionsMap(t *testing.T) {
   "additionalFiles": "",
   "builtInLibrariesFolders": "built-in libraries",
   "builtInToolsFolders": "tools",
+  "compiler.optimization_flags": "-Os",
   "customBuildProperties": "custom=prop",
   "fqbn": "my:nice:fqbn",
   "hardwareFolders": "hardware",
diff --git a/legacy/builder/types/context.go b/legacy/builder/types/context.go
index 8238ed98c3f..50b3935ef79 100644
--- a/legacy/builder/types/context.go
+++ b/legacy/builder/types/context.go
@@ -94,6 +94,10 @@ type Context struct {
 	Verbose           bool
 	DebugPreprocessor bool
 
+	// Compile optimization settings
+	OptimizeForDebug  bool
+	OptimizationFlags string
+
 	// Dry run, only create progress map
 	Progress ProgressStruct
 
@@ -140,6 +144,7 @@ func (ctx *Context) ExtractBuildOptions() *properties.Map {
 	opts.Set("runtime.ide.version", ctx.ArduinoAPIVersion)
 	opts.Set("customBuildProperties", strings.Join(ctx.CustomBuildProperties, ","))
 	opts.Set("additionalFiles", strings.Join(additionalFilesRelative, ","))
+	opts.Set("compiler.optimization_flags", ctx.OptimizationFlags)
 	return opts
 }
 
@@ -156,6 +161,7 @@ func (ctx *Context) InjectBuildOptions(opts *properties.Map) {
 	ctx.FQBN = fqbn
 	ctx.ArduinoAPIVersion = opts.Get("runtime.ide.version")
 	ctx.CustomBuildProperties = strings.Split(opts.Get("customBuildProperties"), ",")
+	ctx.OptimizationFlags = opts.Get("compiler.optimization_flags")
 }
 
 func (ctx *Context) GetLogger() i18n.Logger {
diff --git a/rpc/commands/compile.pb.go b/rpc/commands/compile.pb.go
index ca07e31f157..096bb38ff83 100644
--- a/rpc/commands/compile.pb.go
+++ b/rpc/commands/compile.pb.go
@@ -36,6 +36,7 @@ type CompileReq struct {
 	ExportFile           string    `protobuf:"bytes,13,opt,name=exportFile,proto3" json:"exportFile,omitempty"`
 	Jobs                 int32     `protobuf:"varint,14,opt,name=jobs,proto3" json:"jobs,omitempty"`
 	Libraries            []string  `protobuf:"bytes,15,rep,name=libraries,proto3" json:"libraries,omitempty"`
+	OptimizeForDebug     bool      `protobuf:"varint,16,opt,name=optimizeForDebug,proto3" json:"optimizeForDebug,omitempty"`
 	XXX_NoUnkeyedLiteral struct{}  `json:"-"`
 	XXX_unrecognized     []byte    `json:"-"`
 	XXX_sizecache        int32     `json:"-"`
@@ -171,6 +172,13 @@ func (m *CompileReq) GetLibraries() []string {
 	return nil
 }
 
+func (m *CompileReq) GetOptimizeForDebug() bool {
+	if m != nil {
+		return m.OptimizeForDebug
+	}
+	return false
+}
+
 type CompileResp struct {
 	OutStream            []byte   `protobuf:"bytes,1,opt,name=out_stream,json=outStream,proto3" json:"out_stream,omitempty"`
 	ErrStream            []byte   `protobuf:"bytes,2,opt,name=err_stream,json=errStream,proto3" json:"err_stream,omitempty"`
@@ -226,31 +234,32 @@ func init() {
 func init() { proto.RegisterFile("commands/compile.proto", fileDescriptor_86bc582849c76c3d) }
 
 var fileDescriptor_86bc582849c76c3d = []byte{
-	// 405 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x74, 0x92, 0x41, 0x6f, 0xd4, 0x30,
-	0x10, 0x85, 0x95, 0x6e, 0x77, 0xbb, 0x99, 0x2d, 0xad, 0x64, 0x41, 0xb1, 0x2a, 0x40, 0xa1, 0x07,
-	0x14, 0x09, 0x35, 0x2b, 0xc1, 0x99, 0x0b, 0x95, 0x90, 0x10, 0x97, 0x55, 0xb8, 0x71, 0x41, 0x89,
-	0x33, 0x34, 0x86, 0x24, 0xf6, 0x8e, 0x9d, 0x96, 0x3f, 0xcd, 0x7f, 0x40, 0x9e, 0x6c, 0x36, 0xab,
-	0x95, 0x7a, 0x4a, 0xe6, 0x7b, 0xcf, 0xcf, 0x63, 0x7b, 0xe0, 0x4a, 0x99, 0xb6, 0x2d, 0xba, 0xca,
-	0xad, 0x95, 0x69, 0xad, 0x6e, 0x30, 0xb3, 0x64, 0xbc, 0x11, 0x2f, 0x95, 0xca, 0x0a, 0xaa, 0x7a,
-	0xdd, 0x99, 0x4c, 0x35, 0x3a, 0x1b, 0x6d, 0xd7, 0x2f, 0x0e, 0x17, 0xb4, 0xa6, 0x1b, 0xfc, 0x37,
-	0xff, 0x66, 0x00, 0x77, 0x43, 0x42, 0x8e, 0x5b, 0xf1, 0x09, 0x96, 0xba, 0x73, 0xbe, 0xe8, 0x14,
-	0xca, 0x28, 0x89, 0xd2, 0xd5, 0x87, 0xb7, 0xd9, 0x13, 0x89, 0xd9, 0xd7, 0x9d, 0x31, 0xdf, 0x2f,
-	0x11, 0x02, 0x4e, 0x7f, 0x6d, 0xcb, 0x4e, 0x9e, 0x24, 0x51, 0x1a, 0xe7, 0xfc, 0x2f, 0xde, 0x00,
-	0xb8, 0x3f, 0xe8, 0x55, 0xbd, 0x29, 0x7c, 0x2d, 0x67, 0xac, 0x1c, 0x10, 0xf1, 0x0e, 0x2e, 0x5c,
-	0x6d, 0x1e, 0x37, 0x64, 0x2c, 0x92, 0xd7, 0xe8, 0xe4, 0x69, 0x12, 0xa5, 0xcb, 0xfc, 0x88, 0x86,
-	0x1c, 0x4b, 0x68, 0xc9, 0x28, 0x74, 0x4e, 0xce, 0xd9, 0x73, 0x40, 0x42, 0x4e, 0xd9, 0xeb, 0xa6,
-	0xba, 0x2b, 0x54, 0x8d, 0xbc, 0xd7, 0x82, 0xf7, 0x3a, 0xa2, 0xe2, 0x15, 0xc4, 0x4c, 0xd8, 0x72,
-	0xc6, 0x96, 0x09, 0x88, 0x14, 0x2e, 0x87, 0x62, 0x6a, 0x67, 0x99, 0xcc, 0xd2, 0x38, 0x3f, 0xc6,
-	0xe2, 0x1a, 0x96, 0x8f, 0x05, 0x75, 0xba, 0xbb, 0x77, 0x32, 0xe6, 0x98, 0x7d, 0x2d, 0x24, 0x9c,
-	0x3d, 0x20, 0x95, 0xc6, 0xa1, 0x04, 0x6e, 0x74, 0x2c, 0xc5, 0x73, 0x98, 0x6f, 0x7b, 0x8d, 0x5e,
-	0xae, 0x98, 0x0f, 0x85, 0xb8, 0x82, 0xc5, 0x83, 0xae, 0x36, 0xba, 0x92, 0xe7, 0x9c, 0xb4, 0xab,
-	0xc2, 0x99, 0xf1, 0xaf, 0x35, 0xe4, 0xbf, 0xe8, 0x06, 0xe5, 0xb3, 0xe1, 0xee, 0x26, 0x12, 0xee,
-	0xfb, 0xb7, 0x29, 0x9d, 0xbc, 0x48, 0xa2, 0x74, 0x9e, 0xf3, 0x7f, 0x38, 0x5f, 0xa3, 0x4b, 0x2a,
-	0x28, 0xf4, 0x7e, 0xc9, 0xbd, 0x4f, 0xe0, 0xe6, 0x1b, 0xac, 0xf6, 0xcf, 0xed, 0xac, 0x78, 0x0d,
-	0x60, 0x7a, 0xff, 0xd3, 0x79, 0xc2, 0xa2, 0xe5, 0x17, 0x3f, 0xcf, 0x63, 0xd3, 0xfb, 0xef, 0x0c,
-	0x82, 0x8c, 0x44, 0xa3, 0x7c, 0x32, 0xc8, 0x48, 0x34, 0xc8, 0x9f, 0x6f, 0x7f, 0xbc, 0xbf, 0xd7,
-	0xbe, 0xee, 0xcb, 0x30, 0x14, 0xeb, 0xdd, 0x90, 0x8c, 0xdf, 0x5b, 0xd5, 0xe8, 0x35, 0x59, 0xb5,
-	0x1e, 0x07, 0xa6, 0x5c, 0xf0, 0xc8, 0x7d, 0xfc, 0x1f, 0x00, 0x00, 0xff, 0xff, 0x89, 0x00, 0xe4,
-	0x1f, 0xbc, 0x02, 0x00, 0x00,
+	// 426 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x74, 0x92, 0xc1, 0x6f, 0xd3, 0x30,
+	0x14, 0xc6, 0x95, 0xad, 0xed, 0x9a, 0xd7, 0xb1, 0x4d, 0x16, 0x0c, 0x6b, 0x02, 0x14, 0x76, 0x40,
+	0x11, 0x68, 0xa9, 0x04, 0x67, 0x2e, 0x0c, 0x4d, 0x42, 0x5c, 0xaa, 0x70, 0xe3, 0x82, 0x12, 0xe7,
+	0xd1, 0x18, 0x92, 0xd8, 0x7d, 0x76, 0x36, 0xc4, 0x7f, 0xc2, 0x7f, 0x8b, 0xf2, 0xd2, 0x34, 0x55,
+	0x11, 0x27, 0xfb, 0xfd, 0xde, 0xe7, 0xcf, 0xcf, 0xd6, 0x07, 0x97, 0xca, 0xd4, 0x75, 0xd6, 0x14,
+	0x6e, 0xa9, 0x4c, 0x6d, 0x75, 0x85, 0x89, 0x25, 0xe3, 0x8d, 0x78, 0xaa, 0x54, 0x92, 0x51, 0xd1,
+	0xea, 0xc6, 0x24, 0xaa, 0xd2, 0xc9, 0x20, 0xbb, 0x7a, 0xb2, 0x7f, 0xa0, 0x36, 0x4d, 0xaf, 0xbf,
+	0xfe, 0x33, 0x01, 0xb8, 0xed, 0x1d, 0x52, 0xdc, 0x88, 0xf7, 0x30, 0xd7, 0x8d, 0xf3, 0x59, 0xa3,
+	0x50, 0x06, 0x51, 0x10, 0x2f, 0xde, 0xbe, 0x4c, 0xfe, 0xe3, 0x98, 0x7c, 0xda, 0x0a, 0xd3, 0xdd,
+	0x11, 0x21, 0x60, 0xf2, 0x7d, 0x93, 0x37, 0xf2, 0x28, 0x0a, 0xe2, 0x30, 0xe5, 0xbd, 0x78, 0x01,
+	0xe0, 0x7e, 0xa2, 0x57, 0xe5, 0x2a, 0xf3, 0xa5, 0x3c, 0xe6, 0xce, 0x1e, 0x11, 0xaf, 0xe0, 0xcc,
+	0x95, 0xe6, 0x61, 0x45, 0xc6, 0x22, 0x79, 0x8d, 0x4e, 0x4e, 0xa2, 0x20, 0x9e, 0xa7, 0x07, 0xb4,
+	0xf3, 0xb1, 0x84, 0x96, 0x8c, 0x42, 0xe7, 0xe4, 0x94, 0x35, 0x7b, 0xa4, 0xf3, 0xc9, 0x5b, 0x5d,
+	0x15, 0xb7, 0x99, 0x2a, 0x91, 0xef, 0x9a, 0xf1, 0x5d, 0x07, 0x54, 0x3c, 0x83, 0x90, 0x09, 0x4b,
+	0x4e, 0x58, 0x32, 0x02, 0x11, 0xc3, 0x79, 0x5f, 0x8c, 0xe3, 0xcc, 0xa3, 0xe3, 0x38, 0x4c, 0x0f,
+	0xb1, 0xb8, 0x82, 0xf9, 0x43, 0x46, 0x8d, 0x6e, 0xd6, 0x4e, 0x86, 0x6c, 0xb3, 0xab, 0x85, 0x84,
+	0x93, 0x7b, 0xa4, 0xdc, 0x38, 0x94, 0xc0, 0x83, 0x0e, 0xa5, 0x78, 0x0c, 0xd3, 0x4d, 0xab, 0xd1,
+	0xcb, 0x05, 0xf3, 0xbe, 0x10, 0x97, 0x30, 0xbb, 0xd7, 0xc5, 0x4a, 0x17, 0xf2, 0x94, 0x9d, 0xb6,
+	0x55, 0xf7, 0x66, 0xfc, 0x65, 0x0d, 0xf9, 0x3b, 0x5d, 0xa1, 0x7c, 0xd4, 0xff, 0xdd, 0x48, 0xba,
+	0xff, 0xfe, 0x61, 0x72, 0x27, 0xcf, 0xa2, 0x20, 0x9e, 0xa6, 0xbc, 0xef, 0xde, 0x57, 0xe9, 0x9c,
+	0x32, 0xea, 0x66, 0x3f, 0xe7, 0xd9, 0x47, 0x20, 0x5e, 0xc3, 0x85, 0xb1, 0x5e, 0xd7, 0xfa, 0x37,
+	0xde, 0x19, 0xfa, 0x88, 0x79, 0xbb, 0x96, 0x17, 0x3c, 0xca, 0x3f, 0xfc, 0xfa, 0x33, 0x2c, 0x76,
+	0xd1, 0x70, 0x56, 0x3c, 0x07, 0x30, 0xad, 0xff, 0xe6, 0x3c, 0x61, 0x56, 0x73, 0x3a, 0x4e, 0xd3,
+	0xd0, 0xb4, 0xfe, 0x0b, 0x83, 0xae, 0x8d, 0x44, 0x43, 0xfb, 0xa8, 0x6f, 0x23, 0x51, 0xdf, 0xfe,
+	0x70, 0xf3, 0xf5, 0xcd, 0x5a, 0xfb, 0xb2, 0xcd, 0xbb, 0x00, 0x2d, 0xb7, 0x81, 0x1a, 0xd6, 0x1b,
+	0x55, 0xe9, 0x25, 0x59, 0xb5, 0x1c, 0xc2, 0x95, 0xcf, 0x38, 0x9e, 0xef, 0xfe, 0x06, 0x00, 0x00,
+	0xff, 0xff, 0x89, 0xd3, 0x60, 0xf6, 0xe8, 0x02, 0x00, 0x00,
 }
diff --git a/rpc/commands/compile.proto b/rpc/commands/compile.proto
index cabd9985047..30bde5f5e41 100644
--- a/rpc/commands/compile.proto
+++ b/rpc/commands/compile.proto
@@ -37,6 +37,7 @@ message CompileReq {
   string exportFile = 13;   // The compiled binary is written to this file
   int32 jobs = 14;   // The max number of concurrent compiler instances to run (as make -jx)
   repeated string libraries = 15; // List of custom libraries paths separated by commas. Or can be used multiple times for multiple libraries paths.
+  bool optimizeForDebug = 16; // Optimize compile output for debug, not for release
 }
 
 message CompileResp {
diff --git a/rpc/debug/debug.pb.go b/rpc/debug/debug.pb.go
index fad8b92d951..f1118002282 100644
--- a/rpc/debug/debug.pb.go
+++ b/rpc/debug/debug.pb.go
@@ -205,8 +205,7 @@ func (m *DebugResp) GetError() string {
 	return ""
 }
 
-// duplicate from commands/common.proto
-// as module imports seems not to work
+// TODO remove this in next proto refactoring because is a duplicate from commands/common.proto
 type Instance struct {
 	Id                   int32    `protobuf:"varint,1,opt,name=id,proto3" json:"id,omitempty"`
 	XXX_NoUnkeyedLiteral struct{} `json:"-"`