Jarred-Sumner

How React Fast Refresh works

Implementations:

• https://github.com/facebook/react/blob/master/packages/react-refresh/src/ReactFreshBabelPlugin.js
• https://github.com/swc-project/swc/blob/master/ecmascript/transforms/react/src/refresh/mod.rs

Additional reading:

• facebook/react#16604 (comment)
• https://github.com/facebook/react/blob/master/packages/react-refresh/src/__tests__/ReactFreshIntegration-test.js

Jarred-Sumner

//
//  YeetJSIUTils.h
//  yeet
//
//  Created by Jarred WSumner on 1/30/20.
//  Copyright © 2020 Facebook. All rights reserved.
//

#import <Foundation/Foundation.h>
#import <jsi/jsi.h>

Jarred-Sumner

const std = @import("std");

pub fn preallocate_file(fd: std.os.fd_t, offset: std.os.off_t, len: std.os.off_t) void {
    _ = std.os.linux.fallocate(fd, 0, @intCast(i64, offset), len);
}

pub fn main() anyerror!void {
    const argv = std.process.argsAlloc(std.heap.c_allocator) catch unreachable;
    if (argv.len < 3) {
        std.log.warn("Usage: {s} <length> <file> [--preallocate]\n", .{argv[0]});

Jarred-Sumner

// Comcast Cable Communications, LLC Proprietary. Copyright 2014.
// Intended use is to display browser notifications for critical and time sensitive events.
var _ComcastAlert = (function(){
	return {
		SYS_URL: '/e8f6b078-0f35-11de-85c5-efc5ef23aa1f/aupm/notify.do'
		, dragObj: {zIndex: 999999}
		, browser: null
		, comcastCheck: 1
		, comcastTimer: null
		, xmlhttp: null

Jarred-Sumner

const std = @import("std");

// usage:
// ./file-path:0 10
// 1           2 3

// 1. file path
// 2. Byte offset in file
// 3. ms update interval
pub fn main() anyerror!void {

Jarred-Sumner

import logo from "./logo.svg";
import "./App.css";

function App() {
  const ms = Date.now() - parseInt(window.location.search.substring(1), 10);
  return (
    <div className="App">
      <header className="App-header">
        <img src={logo} className="App-logo" alt="logo" />
        <h3>Loaded in {ms}ms.</h3>

Jarred-Sumner

//go:generate go-enum -f=$GOFILE --marshal
// originally a fork of https://github.com/blang/semver iirc
package node_semver

import (
	"math"
	"math/bits"
	"sort"
	"strconv"
	"strings"

Jarred-Sumner

pub fn eqlComptime(self: string, comptime alt: anytype) bool {
    switch (comptime alt.len) {
        0 => {
            @compileError("Invalid size passed to eqlComptime");
        },
        2 => {
            const check = comptime std.mem.readIntNative(u16, alt[0..alt.len]);
            return self.len == alt.len and std.mem.readIntNative(u16, self[0..2]) == check;
        },

Jarred-Sumner

const std = @import("std");
const Api = @import("./api/schema.zig").Api;
usingnamespace @import("./global.zig");

/// QueryString array-backed hash table that does few allocations and preserves the original order
pub const QueryStringMap = struct {
    allocator: *std.mem.Allocator,
    slice: string,
    buffer: []u8,
    list: Param.List,

Jarred-Sumner

// AUTO-GENERATED 
#pragma once
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#define ZIG_DECL extern
#define CPP_DECL extern 


#pragma mark - JSC::JSObject