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8 changes: 8 additions & 0 deletions packages/react-reconciler/src/SchedulingProfiler.js
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@ import {
enableSchedulingProfiler,
enableSchedulingProfilerComponentStacks,
} from 'shared/ReactFeatureFlags';
import ReactVersion from 'shared/ReactVersion';
import getComponentName from 'shared/getComponentName';
import {getStackByFiberInDevAndProd} from './ReactFiberComponentStack';

Expand All @@ -29,6 +30,13 @@ function formatLanes(laneOrLanes: Lane | Lanes): string {
return ((laneOrLanes: any): number).toString();
}

// Create a mark on React initialization
if (enableSchedulingProfiler) {
if (supportsUserTiming) {
performance.mark(`--react-init-${ReactVersion}`);
}
}

export function markCommitStarted(lanes: Lanes): void {
if (enableSchedulingProfiler) {
if (supportsUserTiming) {
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,8 @@

'use strict';

import ReactVersion from 'shared/ReactVersion';

function normalizeCodeLocInfo(str) {
return (
str &&
Expand Down Expand Up @@ -54,6 +56,7 @@ describe('SchedulingProfiler', () => {
beforeEach(() => {
jest.resetModules();
global.performance = createUserTimingPolyfill();
marks = [];

React = require('react');

Expand All @@ -62,8 +65,6 @@ describe('SchedulingProfiler', () => {
ReactNoop = require('react-noop-renderer');

Scheduler = require('scheduler');

marks = [];
});

afterEach(() => {
Expand All @@ -76,11 +77,17 @@ describe('SchedulingProfiler', () => {
expect(marks).toEqual([]);
});

// @gate enableSchedulingProfiler
it('should log React version on initialization', () => {
expect(marks).toEqual([`--react-init-${ReactVersion}`]);
});

// @gate enableSchedulingProfiler
it('should mark sync render without suspends or state updates', () => {
ReactTestRenderer.create(<div />);

expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-1',
'--render-start-1',
'--render-stop',
Expand All @@ -95,7 +102,10 @@ describe('SchedulingProfiler', () => {
it('should mark concurrent render without suspends or state updates', () => {
ReactTestRenderer.create(<div />, {unstable_isConcurrent: true});

expect(marks).toEqual(['--schedule-render-512']);
expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
]);

marks.splice(0);

Expand Down Expand Up @@ -128,6 +138,7 @@ describe('SchedulingProfiler', () => {
expect(ReactNoop.flushNextYield()).toEqual(['Foo']);

expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
'--render-start-512',
'--render-yield',
Expand All @@ -148,6 +159,7 @@ describe('SchedulingProfiler', () => {
);

expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-1',
'--render-start-1',
toggleComponentStacks(
Expand Down Expand Up @@ -184,6 +196,7 @@ describe('SchedulingProfiler', () => {
);

expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-1',
'--render-start-1',
toggleComponentStacks(
Expand Down Expand Up @@ -220,7 +233,10 @@ describe('SchedulingProfiler', () => {
{unstable_isConcurrent: true},
);

expect(marks).toEqual(['--schedule-render-512']);
expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
]);

marks.splice(0);

Expand Down Expand Up @@ -262,7 +278,10 @@ describe('SchedulingProfiler', () => {
{unstable_isConcurrent: true},
);

expect(marks).toEqual(['--schedule-render-512']);
expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
]);

marks.splice(0);

Expand Down Expand Up @@ -304,7 +323,10 @@ describe('SchedulingProfiler', () => {

ReactTestRenderer.create(<Example />, {unstable_isConcurrent: true});

expect(marks).toEqual(['--schedule-render-512']);
expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
]);

marks.splice(0);

Expand Down Expand Up @@ -340,7 +362,10 @@ describe('SchedulingProfiler', () => {

ReactTestRenderer.create(<Example />, {unstable_isConcurrent: true});

expect(marks).toEqual(['--schedule-render-512']);
expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
]);

marks.splice(0);

Expand Down Expand Up @@ -377,7 +402,10 @@ describe('SchedulingProfiler', () => {

ReactTestRenderer.create(<Example />, {unstable_isConcurrent: true});

expect(marks).toEqual(['--schedule-render-512']);
expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
]);

marks.splice(0);

Expand Down Expand Up @@ -414,7 +442,10 @@ describe('SchedulingProfiler', () => {

ReactTestRenderer.create(<Example />, {unstable_isConcurrent: true});

expect(marks).toEqual(['--schedule-render-512']);
expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
]);

marks.splice(0);

Expand Down Expand Up @@ -449,7 +480,10 @@ describe('SchedulingProfiler', () => {

ReactTestRenderer.create(<Example />, {unstable_isConcurrent: true});

expect(marks).toEqual(['--schedule-render-512']);
expect(marks).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
]);

marks.splice(0);

Expand Down Expand Up @@ -489,6 +523,7 @@ describe('SchedulingProfiler', () => {
gate(({old}) => {
if (old) {
expect(marks.map(normalizeCodeLocInfo)).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
'--render-start-512',
'--render-stop',
Expand All @@ -508,6 +543,7 @@ describe('SchedulingProfiler', () => {
]);
} else {
expect(marks.map(normalizeCodeLocInfo)).toEqual([
`--react-init-${ReactVersion}`,
'--schedule-render-512',
'--render-start-512',
'--render-stop',
Expand Down