Invoke timing

Goal: Measure how long each event invocation takes (all handlers combined) and surface slow events in the Stats tab.

Enable timing

1. Open Window → Event Monitor.
2. Toggle ⏱ Timing in the toolbar (persisted across Editor restarts).
3. Enter Play Mode and trigger instrumented events.

Timing is runtime-gated — no script recompile is required when toggling the setting.

What gets measured

IL Post Processing injects BeginInvokeTiming / EndInvokeTiming around each instrumented Invoke() call site. Duration is stored on the INVOKE record as DurationMs.

When enabled, Unity Profiler shows markers named EventMonitor.<EventName>.

Where to see results

• Log → Detail panel — duration line on INVOKE rows with timing data.
• Stats tab — Slowest events (avg invoke duration) bar chart (top 10).

Notes

• Measures total invoke time for all handlers in one multicast call, not per-handler breakdown.
• Null-conditional ?.Invoke() with no subscribers may not be instrumented (no Invoke opcode).
• Very short invokes may round to 0.00 ms in the UI.

See also

• ILPP vs Reflection Scanner
• IL limitations