chore(app): dev stats

1 files changed, 432 insertions, 0 deletions

diff --git a/packages/app/src/components/debug-bar.tsx b/packages/app/src/components/debug-bar.tsx
new file mode 100644
index 000000000..93a4654f8
--- /dev/null
+++ b/packages/app/src/components/debug-bar.tsx
@@ -0,0 +1,432 @@
+import { useIsRouting, useLocation } from "@solidjs/router"
+import { batch, createEffect, onCleanup, onMount } from "solid-js"
+import { createStore } from "solid-js/store"
+import { Tooltip } from "@opencode-ai/ui/tooltip"
+
+type Mem = Performance & {
+  memory?: {
+    usedJSHeapSize: number
+    jsHeapSizeLimit: number
+  }
+}
+
+type Evt = PerformanceEntry & {
+  interactionId?: number
+  processingStart?: number
+}
+
+type Shift = PerformanceEntry & {
+  hadRecentInput: boolean
+  value: number
+}
+
+type Obs = PerformanceObserverInit & {
+  durationThreshold?: number
+}
+
+const span = 5000
+
+const ms = (n?: number, d = 0) => {
+  if (n === undefined || Number.isNaN(n)) return "n/a"
+  return `${n.toFixed(d)}ms`
+}
+
+const time = (n?: number) => {
+  if (n === undefined || Number.isNaN(n)) return "n/a"
+  return `${Math.round(n)}`
+}
+
+const mb = (n?: number) => {
+  if (n === undefined || Number.isNaN(n)) return "n/a"
+  const v = n / 1024 / 1024
+  return `${v >= 1024 ? v.toFixed(0) : v.toFixed(1)}MB`
+}
+
+const bad = (n: number | undefined, limit: number, low = false) => {
+  if (n === undefined || Number.isNaN(n)) return false
+  return low ? n < limit : n > limit
+}
+
+const session = (path: string) => path.includes("/session")
+
+function Cell(props: { bad?: boolean; dim?: boolean; label: string; tip: string; value: string }) {
+  return (
+    <Tooltip value={props.tip} placement="left">
+      <div class="flex w-full flex-col items-center px-0.5 py-1 text-center">
+        <div class="text-[7px] font-black uppercase tracking-[0.04em] opacity-70 leading-none">{props.label}</div>
+        <div
+          classList={{
+            "text-[9px] font-semibold leading-none tabular-nums": true,
+            "text-text-on-critical-base": !!props.bad,
+            "opacity-70": !!props.dim,
+          }}
+        >
+          {props.value}
+        </div>
+      </div>
+    </Tooltip>
+  )
+}
+
+export function DebugBar() {
+  const location = useLocation()
+  const routing = useIsRouting()
+  const [state, setState] = createStore({
+    cls: undefined as number | undefined,
+    delay: undefined as number | undefined,
+    fps: undefined as number | undefined,
+    gap: undefined as number | undefined,
+    heap: {
+      limit: undefined as number | undefined,
+      used: undefined as number | undefined,
+    },
+    inp: undefined as number | undefined,
+    jank: undefined as number | undefined,
+    long: {
+      block: undefined as number | undefined,
+      count: undefined as number | undefined,
+      max: undefined as number | undefined,
+    },
+    nav: {
+      dur: undefined as number | undefined,
+      pending: false,
+    },
+  })
+
+  const heap = () => (state.heap.limit ? (state.heap.used ?? 0) / state.heap.limit : undefined)
+  const heapv = () => {
+    const value = heap()
+    if (value === undefined) return "n/a"
+    return `${Math.round(value * 100)}%`
+  }
+  const longv = () => (state.long.count === undefined ? "n/a" : `${time(state.long.block)}/${state.long.count}`)
+  const navv = () => (state.nav.pending ? "..." : time(state.nav.dur))
+
+  let prev = ""
+  let start = 0
+  let init = false
+  let one = 0
+  let two = 0
+
+  createEffect(() => {
+    const busy = routing()
+    const next = `${location.pathname}${location.search}`
+
+    if (!init) {
+      init = true
+      prev = next
+      return
+    }
+
+    if (busy) {
+      if (one !== 0) cancelAnimationFrame(one)
+      if (two !== 0) cancelAnimationFrame(two)
+      one = 0
+      two = 0
+      if (start !== 0) return
+      start = performance.now()
+      if (session(prev)) setState("nav", { dur: undefined, pending: true })
+      return
+    }
+
+    if (start === 0) {
+      prev = next
+      return
+    }
+
+    const at = start
+    const from = prev
+    start = 0
+    prev = next
+
+    if (!(session(from) || session(next))) return
+
+    if (one !== 0) cancelAnimationFrame(one)
+    if (two !== 0) cancelAnimationFrame(two)
+    one = requestAnimationFrame(() => {
+      one = 0
+      two = requestAnimationFrame(() => {
+        two = 0
+        setState("nav", { dur: performance.now() - at, pending: false })
+      })
+    })
+  })
+
+  onMount(() => {
+    const obs: PerformanceObserver[] = []
+    const fps: Array<{ at: number; dur: number }> = []
+    const long: Array<{ at: number; dur: number }> = []
+    const seen = new Map<number | string, { at: number; delay: number; dur: number }>()
+    let hasLong = false
+    let poll: number | undefined
+    let raf = 0
+    let last = 0
+    let snap = 0
+
+    const trim = (list: Array<{ at: number; dur: number }>, span: number, at: number) => {
+      while (list[0] && at - list[0].at > span) list.shift()
+    }
+
+    const syncFrame = (at: number) => {
+      trim(fps, span, at)
+      const total = fps.reduce((sum, entry) => sum + entry.dur, 0)
+      const gap = fps.reduce((max, entry) => Math.max(max, entry.dur), 0)
+      const jank = fps.filter((entry) => entry.dur > 32).length
+      batch(() => {
+        setState("fps", total > 0 ? (fps.length * 1000) / total : undefined)
+        setState("gap", gap > 0 ? gap : undefined)
+        setState("jank", jank)
+      })
+    }
+
+    const syncLong = (at = performance.now()) => {
+      if (!hasLong) return
+      trim(long, span, at)
+      const block = long.reduce((sum, entry) => sum + Math.max(0, entry.dur - 50), 0)
+      const max = long.reduce((hi, entry) => Math.max(hi, entry.dur), 0)
+      setState("long", { block, count: long.length, max })
+    }
+
+    const syncInp = (at = performance.now()) => {
+      for (const [key, entry] of seen) {
+        if (at - entry.at > span) seen.delete(key)
+      }
+      let delay = 0
+      let inp = 0
+      for (const entry of seen.values()) {
+        delay = Math.max(delay, entry.delay)
+        inp = Math.max(inp, entry.dur)
+      }
+      batch(() => {
+        setState("delay", delay > 0 ? delay : undefined)
+        setState("inp", inp > 0 ? inp : undefined)
+      })
+    }
+
+    const syncHeap = () => {
+      const mem = (performance as Mem).memory
+      if (!mem) return
+      setState("heap", { limit: mem.jsHeapSizeLimit, used: mem.usedJSHeapSize })
+    }
+
+    const reset = () => {
+      fps.length = 0
+      long.length = 0
+      seen.clear()
+      last = 0
+      snap = 0
+      batch(() => {
+        setState("fps", undefined)
+        setState("gap", undefined)
+        setState("jank", undefined)
+        setState("delay", undefined)
+        setState("inp", undefined)
+        if (hasLong) setState("long", { block: 0, count: 0, max: 0 })
+      })
+    }
+
+    const watch = (type: string, init: Obs, fn: (entries: PerformanceEntry[]) => void) => {
+      if (typeof PerformanceObserver === "undefined") return false
+      if (!(PerformanceObserver.supportedEntryTypes ?? []).includes(type)) return false
+      const ob = new PerformanceObserver((list) => fn(list.getEntries()))
+      try {
+        ob.observe(init)
+        obs.push(ob)
+        return true
+      } catch {
+        ob.disconnect()
+        return false
+      }
+    }
+
+    if (
+      watch("layout-shift", { buffered: true, type: "layout-shift" }, (entries) => {
+        const add = entries.reduce((sum, entry) => {
+          const item = entry as Shift
+          if (item.hadRecentInput) return sum
+          return sum + item.value
+        }, 0)
+        if (add === 0) return
+        setState("cls", (value) => (value ?? 0) + add)
+      })
+    ) {
+      setState("cls", 0)
+    }
+
+    if (
+      watch("longtask", { buffered: true, type: "longtask" }, (entries) => {
+        const at = performance.now()
+        long.push(...entries.map((entry) => ({ at: entry.startTime, dur: entry.duration })))
+        syncLong(at)
+      })
+    ) {
+      hasLong = true
+      setState("long", { block: 0, count: 0, max: 0 })
+    }
+
+    watch("event", { buffered: true, durationThreshold: 16, type: "event" }, (entries) => {
+      for (const raw of entries) {
+        const entry = raw as Evt
+        if (entry.duration < 16) continue
+        const key =
+          entry.interactionId && entry.interactionId > 0
+            ? entry.interactionId
+            : `${entry.name}:${Math.round(entry.startTime)}`
+        const prev = seen.get(key)
+        const delay = Math.max(0, (entry.processingStart ?? entry.startTime) - entry.startTime)
+        seen.set(key, {
+          at: entry.startTime,
+          delay: Math.max(prev?.delay ?? 0, delay),
+          dur: Math.max(prev?.dur ?? 0, entry.duration),
+        })
+        if (seen.size <= 200) continue
+        const first = seen.keys().next().value
+        if (first !== undefined) seen.delete(first)
+      }
+      syncInp()
+    })
+
+    const loop = (at: number) => {
+      if (document.visibilityState !== "visible") {
+        raf = 0
+        return
+      }
+
+      if (last === 0) {
+        last = at
+        raf = requestAnimationFrame(loop)
+        return
+      }
+
+      fps.push({ at, dur: at - last })
+      last = at
+
+      if (at - snap >= 250) {
+        snap = at
+        syncFrame(at)
+      }
+
+      raf = requestAnimationFrame(loop)
+    }
+
+    const stop = () => {
+      if (raf !== 0) cancelAnimationFrame(raf)
+      raf = 0
+      if (poll === undefined) return
+      clearInterval(poll)
+      poll = undefined
+    }
+
+    const start = () => {
+      if (document.visibilityState !== "visible") return
+      if (poll === undefined) {
+        poll = window.setInterval(() => {
+          syncLong()
+          syncInp()
+          syncHeap()
+        }, 1000)
+      }
+      if (raf !== 0) return
+      raf = requestAnimationFrame(loop)
+    }
+
+    const vis = () => {
+      if (document.visibilityState !== "visible") {
+        stop()
+        return
+      }
+      reset()
+      start()
+    }
+
+    syncHeap()
+    start()
+    document.addEventListener("visibilitychange", vis)
+
+    onCleanup(() => {
+      if (one !== 0) cancelAnimationFrame(one)
+      if (two !== 0) cancelAnimationFrame(two)
+      stop()
+      document.removeEventListener("visibilitychange", vis)
+      for (const ob of obs) ob.disconnect()
+    })
+  })
+
+  return (
+    <aside
+      aria-label="Development performance diagnostics"
+      class="pointer-events-auto h-full min-h-0 w-[36px] shrink-0 overflow-y-auto text-text-on-interactive-base no-scrollbar sm:w-[38px]"
+      style={{ "background-color": "color-mix(in srgb, var(--icon-interactive-base) 42%, black)" }}
+    >
+      <div class="flex min-h-full flex-col gap-0.5 py-2 font-mono">
+        <Cell
+          label="NAV"
+          tip="Last completed route transition touching a session page, measured from router start until the first paint after it settles."
+          value={navv()}
+          bad={bad(state.nav.dur, 400)}
+          dim={state.nav.dur === undefined && !state.nav.pending}
+        />
+        <Cell
+          label="FPS"
+          tip="Rolling frames per second over the last 5 seconds."
+          value={state.fps === undefined ? "n/a" : `${Math.round(state.fps)}`}
+          bad={bad(state.fps, 50, true)}
+          dim={state.fps === undefined}
+        />
+        <Cell
+          label="FRM"
+          tip="Worst frame time over the last 5 seconds."
+          value={time(state.gap)}
+          bad={bad(state.gap, 50)}
+          dim={state.gap === undefined}
+        />
+        <Cell
+          label="JNK"
+          tip="Frames over 32ms in the last 5 seconds."
+          value={state.jank === undefined ? "n/a" : `${state.jank}`}
+          bad={bad(state.jank, 8)}
+          dim={state.jank === undefined}
+        />
+        <Cell
+          label="LNG"
+          tip={`Blocked time and long-task count in the last 5 seconds. Max task: ${ms(state.long.max)}.`}
+          value={longv()}
+          bad={bad(state.long.block, 200)}
+          dim={state.long.count === undefined}
+        />
+        <Cell
+          label="DLY"
+          tip="Worst observed input delay in the last 5 seconds."
+          value={time(state.delay)}
+          bad={bad(state.delay, 100)}
+          dim={state.delay === undefined}
+        />
+        <Cell
+          label="INP"
+          tip="Approximate interaction duration over the last 5 seconds. This is INP-like, not the official Web Vitals INP."
+          value={time(state.inp)}
+          bad={bad(state.inp, 200)}
+          dim={state.inp === undefined}
+        />
+        <Cell
+          label="CLS"
+          tip="Cumulative layout shift for the current app lifetime."
+          value={state.cls === undefined ? "n/a" : state.cls.toFixed(2)}
+          bad={bad(state.cls, 0.1)}
+          dim={state.cls === undefined}
+        />
+        <Cell
+          label="MEM"
+          tip={
+            state.heap.used === undefined
+              ? "Used JS heap vs heap limit. Chromium only."
+              : `Used JS heap vs heap limit. ${mb(state.heap.used)} of ${mb(state.heap.limit)}.`
+          }
+          value={heapv()}
+          bad={bad(heap(), 0.8)}
+          dim={state.heap.used === undefined}
+        />
+      </div>
+    </aside>
+  )
+}