ds300

{
  "vim.easymotion": true,
  "vim.leader": "<space>",
  "files.autoSave": "afterDelay",
  "editor.formatOnSave": true,
  "editor.codeActionsOnSave": ["source.addMissingImports"],
  "vim.visualModeKeyBindingsNonRecursive": [
    {
      "before": ["<leader>", "g"],
      "commands": ["editor.action.smartSelect.grow"]

ds300

import { useCallback, useEffect, useMemo } from 'react'

export class Poller<T> {
	private interval: ReturnType<typeof setInterval> | null = null
	constructor(
		private readonly callback: (arg: { didCancelRef: { current: boolean } }) => T,
		private readonly intervalMs: number
	) {}
	readonly didCancelRef = { current: false }
	start() {

ds300

class Stats {
	periods = 0
	totals = {} as Record<string, number>
	starts = {} as Record<string, number>
	start(name: string) {
		this.starts[name] = performance.now()
	}
	end(name: string) {
		if (!this.starts[name]) throw new Error(`No start for ${name}`)