diff --git a/ui/metrics/metrics_proto/metrics.pb.go b/ui/metrics/metrics_proto/metrics.pb.go
new file mode 100644
index 0000000..feefc89
--- /dev/null
+++ b/ui/metrics/metrics_proto/metrics.pb.go
@@ -0,0 +1,557 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: metrics.proto
+
+package metrics_proto
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type MetricsBase_BUILDVARIANT int32
+
+const (
+	MetricsBase_USER      MetricsBase_BUILDVARIANT = 0
+	MetricsBase_USERDEBUG MetricsBase_BUILDVARIANT = 1
+	MetricsBase_ENG       MetricsBase_BUILDVARIANT = 2
+)
+
+var MetricsBase_BUILDVARIANT_name = map[int32]string{
+	0: "USER",
+	1: "USERDEBUG",
+	2: "ENG",
+}
+var MetricsBase_BUILDVARIANT_value = map[string]int32{
+	"USER":      0,
+	"USERDEBUG": 1,
+	"ENG":       2,
+}
+
+func (x MetricsBase_BUILDVARIANT) Enum() *MetricsBase_BUILDVARIANT {
+	p := new(MetricsBase_BUILDVARIANT)
+	*p = x
+	return p
+}
+func (x MetricsBase_BUILDVARIANT) String() string {
+	return proto.EnumName(MetricsBase_BUILDVARIANT_name, int32(x))
+}
+func (x *MetricsBase_BUILDVARIANT) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(MetricsBase_BUILDVARIANT_value, data, "MetricsBase_BUILDVARIANT")
+	if err != nil {
+		return err
+	}
+	*x = MetricsBase_BUILDVARIANT(value)
+	return nil
+}
+func (MetricsBase_BUILDVARIANT) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_9e7b895801991242, []int{0, 0}
+}
+
+type MetricsBase_ARCH int32
+
+const (
+	MetricsBase_UNKNOWN MetricsBase_ARCH = 0
+	MetricsBase_ARM     MetricsBase_ARCH = 1
+	MetricsBase_ARM64   MetricsBase_ARCH = 2
+	MetricsBase_X86     MetricsBase_ARCH = 3
+	MetricsBase_X86_64  MetricsBase_ARCH = 4
+)
+
+var MetricsBase_ARCH_name = map[int32]string{
+	0: "UNKNOWN",
+	1: "ARM",
+	2: "ARM64",
+	3: "X86",
+	4: "X86_64",
+}
+var MetricsBase_ARCH_value = map[string]int32{
+	"UNKNOWN": 0,
+	"ARM":     1,
+	"ARM64":   2,
+	"X86":     3,
+	"X86_64":  4,
+}
+
+func (x MetricsBase_ARCH) Enum() *MetricsBase_ARCH {
+	p := new(MetricsBase_ARCH)
+	*p = x
+	return p
+}
+func (x MetricsBase_ARCH) String() string {
+	return proto.EnumName(MetricsBase_ARCH_name, int32(x))
+}
+func (x *MetricsBase_ARCH) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(MetricsBase_ARCH_value, data, "MetricsBase_ARCH")
+	if err != nil {
+		return err
+	}
+	*x = MetricsBase_ARCH(value)
+	return nil
+}
+func (MetricsBase_ARCH) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_9e7b895801991242, []int{0, 1}
+}
+
+type ModuleTypeInfo_BUILDSYSTEM int32
+
+const (
+	ModuleTypeInfo_UNKNOWN ModuleTypeInfo_BUILDSYSTEM = 0
+	ModuleTypeInfo_SOONG   ModuleTypeInfo_BUILDSYSTEM = 1
+	ModuleTypeInfo_MAKE    ModuleTypeInfo_BUILDSYSTEM = 2
+)
+
+var ModuleTypeInfo_BUILDSYSTEM_name = map[int32]string{
+	0: "UNKNOWN",
+	1: "SOONG",
+	2: "MAKE",
+}
+var ModuleTypeInfo_BUILDSYSTEM_value = map[string]int32{
+	"UNKNOWN": 0,
+	"SOONG":   1,
+	"MAKE":    2,
+}
+
+func (x ModuleTypeInfo_BUILDSYSTEM) Enum() *ModuleTypeInfo_BUILDSYSTEM {
+	p := new(ModuleTypeInfo_BUILDSYSTEM)
+	*p = x
+	return p
+}
+func (x ModuleTypeInfo_BUILDSYSTEM) String() string {
+	return proto.EnumName(ModuleTypeInfo_BUILDSYSTEM_name, int32(x))
+}
+func (x *ModuleTypeInfo_BUILDSYSTEM) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(ModuleTypeInfo_BUILDSYSTEM_value, data, "ModuleTypeInfo_BUILDSYSTEM")
+	if err != nil {
+		return err
+	}
+	*x = ModuleTypeInfo_BUILDSYSTEM(value)
+	return nil
+}
+func (ModuleTypeInfo_BUILDSYSTEM) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_9e7b895801991242, []int{2, 0}
+}
+
+type MetricsBase struct {
+	// Timestamp generated when the build starts.
+	BuildDateTimestamp *int64 `protobuf:"varint,1,opt,name=build_date_timestamp,json=buildDateTimestamp" json:"build_date_timestamp,omitempty"`
+	// It is usually used to specify the branch name [and release candidate].
+	BuildId *string `protobuf:"bytes,2,opt,name=build_id,json=buildId" json:"build_id,omitempty"`
+	// The platform version codename, eg. P, Q, REL.
+	PlatformVersionCodename *string `protobuf:"bytes,3,opt,name=platform_version_codename,json=platformVersionCodename" json:"platform_version_codename,omitempty"`
+	// The target product information, eg. aosp_arm.
+	TargetProduct *string `protobuf:"bytes,4,opt,name=target_product,json=targetProduct" json:"target_product,omitempty"`
+	// The target build variant information, eg. eng.
+	TargetBuildVariant *MetricsBase_BUILDVARIANT `protobuf:"varint,5,opt,name=target_build_variant,json=targetBuildVariant,enum=build_metrics.MetricsBase_BUILDVARIANT,def=2" json:"target_build_variant,omitempty"`
+	// The target arch information, eg. arm.
+	TargetArch *MetricsBase_ARCH `protobuf:"varint,6,opt,name=target_arch,json=targetArch,enum=build_metrics.MetricsBase_ARCH,def=0" json:"target_arch,omitempty"`
+	// The target arch variant information, eg. armv7-a-neon.
+	TargetArchVariant *string `protobuf:"bytes,7,opt,name=target_arch_variant,json=targetArchVariant" json:"target_arch_variant,omitempty"`
+	// The target cpu variant information, eg. generic.
+	TargetCpuVariant *string `protobuf:"bytes,8,opt,name=target_cpu_variant,json=targetCpuVariant" json:"target_cpu_variant,omitempty"`
+	// The host arch information, eg. x86_64.
+	HostArch *MetricsBase_ARCH `protobuf:"varint,9,opt,name=host_arch,json=hostArch,enum=build_metrics.MetricsBase_ARCH,def=0" json:"host_arch,omitempty"`
+	// The host 2nd arch information, eg. x86.
+	Host_2NdArch *MetricsBase_ARCH `protobuf:"varint,10,opt,name=host_2nd_arch,json=host2ndArch,enum=build_metrics.MetricsBase_ARCH,def=0" json:"host_2nd_arch,omitempty"`
+	// The host os information, eg. linux.
+	HostOs *string `protobuf:"bytes,11,opt,name=host_os,json=hostOs" json:"host_os,omitempty"`
+	// The host os extra information, eg. Linux-4.17.0-3rodete2-amd64-x86_64-Debian-GNU.
+	HostOsExtra *string `protobuf:"bytes,12,opt,name=host_os_extra,json=hostOsExtra" json:"host_os_extra,omitempty"`
+	// The host cross os information, eg. windows.
+	HostCrossOs *string `protobuf:"bytes,13,opt,name=host_cross_os,json=hostCrossOs" json:"host_cross_os,omitempty"`
+	// The host cross arch information, eg. x86.
+	HostCrossArch *string `protobuf:"bytes,14,opt,name=host_cross_arch,json=hostCrossArch" json:"host_cross_arch,omitempty"`
+	// The host cross 2nd arch information, eg. x86_64.
+	HostCross_2NdArch *string `protobuf:"bytes,15,opt,name=host_cross_2nd_arch,json=hostCross2ndArch" json:"host_cross_2nd_arch,omitempty"`
+	// The directory for generated built artifacts installation, eg. out.
+	OutDir *string `protobuf:"bytes,16,opt,name=out_dir,json=outDir" json:"out_dir,omitempty"`
+	// The metrics for calling various tools (microfactory) before Soong_UI starts.
+	SetupTools []*PerfInfo `protobuf:"bytes,17,rep,name=setup_tools,json=setupTools" json:"setup_tools,omitempty"`
+	// The metrics for calling Kati by multiple times.
+	KatiRuns []*PerfInfo `protobuf:"bytes,18,rep,name=kati_runs,json=katiRuns" json:"kati_runs,omitempty"`
+	// The metrics for calling Soong.
+	SoongRuns []*PerfInfo `protobuf:"bytes,19,rep,name=soong_runs,json=soongRuns" json:"soong_runs,omitempty"`
+	// The metrics for calling Ninja.
+	NinjaRuns            []*PerfInfo `protobuf:"bytes,20,rep,name=ninja_runs,json=ninjaRuns" json:"ninja_runs,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}    `json:"-"`
+	XXX_unrecognized     []byte      `json:"-"`
+	XXX_sizecache        int32       `json:"-"`
+}
+
+func (m *MetricsBase) Reset()         { *m = MetricsBase{} }
+func (m *MetricsBase) String() string { return proto.CompactTextString(m) }
+func (*MetricsBase) ProtoMessage()    {}
+func (*MetricsBase) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_9e7b895801991242, []int{0}
+}
+func (m *MetricsBase) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_MetricsBase.Unmarshal(m, b)
+}
+func (m *MetricsBase) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_MetricsBase.Marshal(b, m, deterministic)
+}
+func (dst *MetricsBase) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_MetricsBase.Merge(dst, src)
+}
+func (m *MetricsBase) XXX_Size() int {
+	return xxx_messageInfo_MetricsBase.Size(m)
+}
+func (m *MetricsBase) XXX_DiscardUnknown() {
+	xxx_messageInfo_MetricsBase.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_MetricsBase proto.InternalMessageInfo
+
+const Default_MetricsBase_TargetBuildVariant MetricsBase_BUILDVARIANT = MetricsBase_ENG
+const Default_MetricsBase_TargetArch MetricsBase_ARCH = MetricsBase_UNKNOWN
+const Default_MetricsBase_HostArch MetricsBase_ARCH = MetricsBase_UNKNOWN
+const Default_MetricsBase_Host_2NdArch MetricsBase_ARCH = MetricsBase_UNKNOWN
+
+func (m *MetricsBase) GetBuildDateTimestamp() int64 {
+	if m != nil && m.BuildDateTimestamp != nil {
+		return *m.BuildDateTimestamp
+	}
+	return 0
+}
+
+func (m *MetricsBase) GetBuildId() string {
+	if m != nil && m.BuildId != nil {
+		return *m.BuildId
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetPlatformVersionCodename() string {
+	if m != nil && m.PlatformVersionCodename != nil {
+		return *m.PlatformVersionCodename
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetTargetProduct() string {
+	if m != nil && m.TargetProduct != nil {
+		return *m.TargetProduct
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetTargetBuildVariant() MetricsBase_BUILDVARIANT {
+	if m != nil && m.TargetBuildVariant != nil {
+		return *m.TargetBuildVariant
+	}
+	return Default_MetricsBase_TargetBuildVariant
+}
+
+func (m *MetricsBase) GetTargetArch() MetricsBase_ARCH {
+	if m != nil && m.TargetArch != nil {
+		return *m.TargetArch
+	}
+	return Default_MetricsBase_TargetArch
+}
+
+func (m *MetricsBase) GetTargetArchVariant() string {
+	if m != nil && m.TargetArchVariant != nil {
+		return *m.TargetArchVariant
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetTargetCpuVariant() string {
+	if m != nil && m.TargetCpuVariant != nil {
+		return *m.TargetCpuVariant
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetHostArch() MetricsBase_ARCH {
+	if m != nil && m.HostArch != nil {
+		return *m.HostArch
+	}
+	return Default_MetricsBase_HostArch
+}
+
+func (m *MetricsBase) GetHost_2NdArch() MetricsBase_ARCH {
+	if m != nil && m.Host_2NdArch != nil {
+		return *m.Host_2NdArch
+	}
+	return Default_MetricsBase_Host_2NdArch
+}
+
+func (m *MetricsBase) GetHostOs() string {
+	if m != nil && m.HostOs != nil {
+		return *m.HostOs
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetHostOsExtra() string {
+	if m != nil && m.HostOsExtra != nil {
+		return *m.HostOsExtra
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetHostCrossOs() string {
+	if m != nil && m.HostCrossOs != nil {
+		return *m.HostCrossOs
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetHostCrossArch() string {
+	if m != nil && m.HostCrossArch != nil {
+		return *m.HostCrossArch
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetHostCross_2NdArch() string {
+	if m != nil && m.HostCross_2NdArch != nil {
+		return *m.HostCross_2NdArch
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetOutDir() string {
+	if m != nil && m.OutDir != nil {
+		return *m.OutDir
+	}
+	return ""
+}
+
+func (m *MetricsBase) GetSetupTools() []*PerfInfo {
+	if m != nil {
+		return m.SetupTools
+	}
+	return nil
+}
+
+func (m *MetricsBase) GetKatiRuns() []*PerfInfo {
+	if m != nil {
+		return m.KatiRuns
+	}
+	return nil
+}
+
+func (m *MetricsBase) GetSoongRuns() []*PerfInfo {
+	if m != nil {
+		return m.SoongRuns
+	}
+	return nil
+}
+
+func (m *MetricsBase) GetNinjaRuns() []*PerfInfo {
+	if m != nil {
+		return m.NinjaRuns
+	}
+	return nil
+}
+
+type PerfInfo struct {
+	// The description for the phase/action/part while the tool running.
+	Desc *string `protobuf:"bytes,1,opt,name=desc" json:"desc,omitempty"`
+	// The name for the running phase/action/part.
+	Name *string `protobuf:"bytes,2,opt,name=name" json:"name,omitempty"`
+	// The absolute start time.
+	// The number of nanoseconds elapsed since January 1, 1970 UTC.
+	StartTime *uint64 `protobuf:"varint,3,opt,name=start_time,json=startTime" json:"start_time,omitempty"`
+	// The real running time.
+	// The number of nanoseconds elapsed since start_time.
+	RealTime *uint64 `protobuf:"varint,4,opt,name=real_time,json=realTime" json:"real_time,omitempty"`
+	// The number of MB for memory use.
+	MemoryUse            *uint64  `protobuf:"varint,5,opt,name=memory_use,json=memoryUse" json:"memory_use,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *PerfInfo) Reset()         { *m = PerfInfo{} }
+func (m *PerfInfo) String() string { return proto.CompactTextString(m) }
+func (*PerfInfo) ProtoMessage()    {}
+func (*PerfInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_9e7b895801991242, []int{1}
+}
+func (m *PerfInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_PerfInfo.Unmarshal(m, b)
+}
+func (m *PerfInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_PerfInfo.Marshal(b, m, deterministic)
+}
+func (dst *PerfInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_PerfInfo.Merge(dst, src)
+}
+func (m *PerfInfo) XXX_Size() int {
+	return xxx_messageInfo_PerfInfo.Size(m)
+}
+func (m *PerfInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_PerfInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_PerfInfo proto.InternalMessageInfo
+
+func (m *PerfInfo) GetDesc() string {
+	if m != nil && m.Desc != nil {
+		return *m.Desc
+	}
+	return ""
+}
+
+func (m *PerfInfo) GetName() string {
+	if m != nil && m.Name != nil {
+		return *m.Name
+	}
+	return ""
+}
+
+func (m *PerfInfo) GetStartTime() uint64 {
+	if m != nil && m.StartTime != nil {
+		return *m.StartTime
+	}
+	return 0
+}
+
+func (m *PerfInfo) GetRealTime() uint64 {
+	if m != nil && m.RealTime != nil {
+		return *m.RealTime
+	}
+	return 0
+}
+
+func (m *PerfInfo) GetMemoryUse() uint64 {
+	if m != nil && m.MemoryUse != nil {
+		return *m.MemoryUse
+	}
+	return 0
+}
+
+type ModuleTypeInfo struct {
+	// The build system, eg. Soong or Make.
+	BuildSystem *ModuleTypeInfo_BUILDSYSTEM `protobuf:"varint,1,opt,name=build_system,json=buildSystem,enum=build_metrics.ModuleTypeInfo_BUILDSYSTEM,def=0" json:"build_system,omitempty"`
+	// The module type, eg. java_library, cc_binary, and etc.
+	ModuleType *string `protobuf:"bytes,2,opt,name=module_type,json=moduleType" json:"module_type,omitempty"`
+	// The number of logical modules.
+	NumOfModules         *uint32  `protobuf:"varint,3,opt,name=num_of_modules,json=numOfModules" json:"num_of_modules,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *ModuleTypeInfo) Reset()         { *m = ModuleTypeInfo{} }
+func (m *ModuleTypeInfo) String() string { return proto.CompactTextString(m) }
+func (*ModuleTypeInfo) ProtoMessage()    {}
+func (*ModuleTypeInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_metrics_9e7b895801991242, []int{2}
+}
+func (m *ModuleTypeInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ModuleTypeInfo.Unmarshal(m, b)
+}
+func (m *ModuleTypeInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ModuleTypeInfo.Marshal(b, m, deterministic)
+}
+func (dst *ModuleTypeInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ModuleTypeInfo.Merge(dst, src)
+}
+func (m *ModuleTypeInfo) XXX_Size() int {
+	return xxx_messageInfo_ModuleTypeInfo.Size(m)
+}
+func (m *ModuleTypeInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_ModuleTypeInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ModuleTypeInfo proto.InternalMessageInfo
+
+const Default_ModuleTypeInfo_BuildSystem ModuleTypeInfo_BUILDSYSTEM = ModuleTypeInfo_UNKNOWN
+
+func (m *ModuleTypeInfo) GetBuildSystem() ModuleTypeInfo_BUILDSYSTEM {
+	if m != nil && m.BuildSystem != nil {
+		return *m.BuildSystem
+	}
+	return Default_ModuleTypeInfo_BuildSystem
+}
+
+func (m *ModuleTypeInfo) GetModuleType() string {
+	if m != nil && m.ModuleType != nil {
+		return *m.ModuleType
+	}
+	return ""
+}
+
+func (m *ModuleTypeInfo) GetNumOfModules() uint32 {
+	if m != nil && m.NumOfModules != nil {
+		return *m.NumOfModules
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*MetricsBase)(nil), "build_metrics.MetricsBase")
+	proto.RegisterType((*PerfInfo)(nil), "build_metrics.PerfInfo")
+	proto.RegisterType((*ModuleTypeInfo)(nil), "build_metrics.ModuleTypeInfo")
+	proto.RegisterEnum("build_metrics.MetricsBase_BUILDVARIANT", MetricsBase_BUILDVARIANT_name, MetricsBase_BUILDVARIANT_value)
+	proto.RegisterEnum("build_metrics.MetricsBase_ARCH", MetricsBase_ARCH_name, MetricsBase_ARCH_value)
+	proto.RegisterEnum("build_metrics.ModuleTypeInfo_BUILDSYSTEM", ModuleTypeInfo_BUILDSYSTEM_name, ModuleTypeInfo_BUILDSYSTEM_value)
+}
+
+func init() { proto.RegisterFile("metrics.proto", fileDescriptor_metrics_9e7b895801991242) }
+
+var fileDescriptor_metrics_9e7b895801991242 = []byte{
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+}
diff --git a/ui/metrics/metrics_proto/metrics.proto b/ui/metrics/metrics_proto/metrics.proto
new file mode 100644
index 0000000..b3de2f4
--- /dev/null
+++ b/ui/metrics/metrics_proto/metrics.proto
@@ -0,0 +1,129 @@
+// Copyright 2018 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto2";
+
+option optimize_for = LITE_RUNTIME;
+
+package build_metrics;
+option go_package = "metrics_proto";
+
+message MetricsBase {
+  // Timestamp generated when the build starts.
+  optional int64 build_date_timestamp = 1;
+
+  // It is usually used to specify the branch name [and release candidate].
+  optional string build_id  = 2;
+
+  // The platform version codename, eg. P, Q, REL.
+  optional string platform_version_codename = 3;
+
+  // The target product information, eg. aosp_arm.
+  optional string target_product = 4;
+
+  enum BUILDVARIANT {
+    USER = 0;
+    USERDEBUG = 1;
+    ENG = 2;
+  }
+  // The target build variant information, eg. eng.
+  optional BUILDVARIANT target_build_variant = 5 [default = ENG];
+
+  enum ARCH {
+    UNKNOWN = 0;
+    ARM = 1;
+    ARM64 = 2;
+    X86 = 3;
+    X86_64 = 4;
+  }
+  // The target arch information, eg. arm.
+  optional ARCH target_arch = 6 [default = UNKNOWN];
+
+  // The target arch variant information, eg. armv7-a-neon.
+  optional string target_arch_variant = 7;
+
+  // The target cpu variant information, eg. generic.
+  optional string target_cpu_variant = 8;
+
+  // The host arch information, eg. x86_64.
+  optional ARCH host_arch = 9 [default = UNKNOWN];
+
+  // The host 2nd arch information, eg. x86.
+  optional ARCH host_2nd_arch = 10 [default = UNKNOWN];
+
+  // The host os information, eg. linux.
+  optional string host_os = 11;
+
+  // The host os extra information, eg. Linux-4.17.0-3rodete2-amd64-x86_64-Debian-GNU.
+  optional string host_os_extra = 12;
+
+  // The host cross os information, eg. windows.
+  optional string host_cross_os = 13;
+
+  // The host cross arch information, eg. x86.
+  optional string host_cross_arch = 14;
+
+  // The host cross 2nd arch information, eg. x86_64.
+  optional string host_cross_2nd_arch = 15;
+
+  // The directory for generated built artifacts installation, eg. out.
+  optional string out_dir = 16;
+
+  // The metrics for calling various tools (microfactory) before Soong_UI starts.
+  repeated PerfInfo setup_tools = 17;
+
+  // The metrics for calling Kati by multiple times.
+  repeated PerfInfo kati_runs = 18;
+
+  // The metrics for calling Soong.
+  repeated PerfInfo soong_runs = 19;
+
+  // The metrics for calling Ninja.
+  repeated PerfInfo ninja_runs = 20;
+}
+
+message PerfInfo {
+  // The description for the phase/action/part while the tool running.
+  optional string desc = 1;
+
+  // The name for the running phase/action/part.
+  optional string name = 2;
+
+  // The absolute start time.
+  // The number of nanoseconds elapsed since January 1, 1970 UTC.
+  optional uint64 start_time = 3;
+
+  // The real running time.
+  // The number of nanoseconds elapsed since start_time.
+  optional uint64 real_time = 4;
+
+  // The number of MB for memory use.
+  optional uint64 memory_use = 5;
+}
+
+message ModuleTypeInfo {
+  enum BUILDSYSTEM {
+    UNKNOWN = 0;
+    SOONG = 1;
+    MAKE = 2;
+  }
+  // The build system, eg. Soong or Make.
+  optional BUILDSYSTEM build_system = 1 [default = UNKNOWN];
+
+  // The module type, eg. java_library, cc_binary, and etc.
+  optional string module_type = 2;
+
+  // The number of logical modules.
+  optional uint32 num_of_modules = 3;
+}
diff --git a/ui/metrics/metrics_proto/regen.sh b/ui/metrics/metrics_proto/regen.sh
new file mode 100755
index 0000000..343c638
--- /dev/null
+++ b/ui/metrics/metrics_proto/regen.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+aprotoc --go_out=paths=source_relative:. metrics.proto