Graham McIntire
bd3b1148a4
Clicks on the map were hanging for 1-3s, triggering the Phoenix topbar progress bar visible to the user. Three hot-path improvements: 1. ScoresFile.read_point now uses a two-range :file.pread/2 — reads the 33-byte header + one cell byte (~60 bytes) instead of the full ~93 KB file. point_forecast walks 19 forecast hours per click, so the old full-read path was the dominant cost on cold cache. 2. ProfilesFile.read/1 and list_valid_times/0 cached via Microwaveprop.Cache (5s TTL). Decoded profile maps are ~10 MB each (92k cells); timeline scrub that re-clicks the same valid_time within seconds now hits ETS instead of re-gunzipping + decoding. Cache keys include base_dir so test setup that swaps dirs doesn't see stale entries. Writes + prune + retain_window invalidate. 3. Endpoint log_level now filters /metrics the same way it already filters /health — Prometheus scrapes every 5s and was producing visible log spam. Pod-local ETS is right for this workload (per-click read, tiny working set); Valkey / shared memstore would not help here since each pod needs its own fast-path lookup. File a follow-up if cross-pod score lookups ever show up in flame graphs.
66 lines
2 KiB
Elixir
66 lines
2 KiB
Elixir
defmodule MicrowavepropWeb.Endpoint do
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use Phoenix.Endpoint, otp_app: :microwaveprop
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# The session will be stored in the cookie and signed,
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# this means its contents can be read but not tampered with.
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# Set :encryption_salt if you would also like to encrypt it.
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@session_options [
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store: :cookie,
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key: "_microwaveprop_key",
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signing_salt: "FBet7+Mi",
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same_site: "Lax"
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]
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socket "/live", Phoenix.LiveView.Socket,
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websocket: [connect_info: [session: @session_options]],
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longpoll: [connect_info: [session: @session_options]]
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# Serve at "/" the static files from "priv/static" directory.
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#
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# When code reloading is disabled (e.g., in production),
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# the `gzip` option is enabled to serve compressed
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# static files generated by running `phx.digest`.
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plug Plug.Static,
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at: "/",
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from: :microwaveprop,
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gzip: not code_reloading?,
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only: MicrowavepropWeb.static_paths(),
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raise_on_missing_only: code_reloading?
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if code_reloading? do
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plug Tidewave
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end
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# Code reloading can be explicitly enabled under the
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# :code_reloader configuration of your endpoint.
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if code_reloading? do
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socket "/phoenix/live_reload/socket", Phoenix.LiveReloader.Socket
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plug Phoenix.LiveReloader
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plug Phoenix.CodeReloader
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plug Phoenix.Ecto.CheckRepoStatus, otp_app: :microwaveprop
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end
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plug Phoenix.LiveDashboard.RequestLogger,
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param_key: "request_logger",
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cookie_key: "request_logger"
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plug Plug.RequestId
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plug MicrowavepropWeb.Plugs.RemoteIp
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plug Plug.Telemetry, event_prefix: [:phoenix, :endpoint], log: {__MODULE__, :log_level, []}
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plug Plug.Parsers,
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parsers: [:urlencoded, :multipart, :json],
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pass: ["*/*"],
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json_decoder: Phoenix.json_library()
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plug Plug.MethodOverride
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plug Plug.Head
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plug Plug.Session, @session_options
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plug MicrowavepropWeb.Router
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@doc false
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def log_level(%{path_info: ["health"]}), do: false
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def log_level(%{path_info: ["metrics" | _]}), do: false
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def log_level(%{method: "HEAD"}), do: false
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def log_level(_conn), do: :info
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end
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