src/vs/workbench/api/common/extHostExtensionService.ts/AbstractExtHostExtensionService/_activateAllStartupFinished
class AbstractExtHostExtensionService:	private _activateAllStartupFinished(): void {
		// startup is considered finished
		this._mainThreadExtensionsProxy.$setPerformanceMarks(performance.getMarks());

		for (const desc of this._registry.getAllExtensionDescriptions()) {
			if (desc.activationEvents) {
				for (const activationEvent of desc.activationEvents) {
					if (activationEvent === 'onStartupFinished') {
						this._activateOneStartupFinished(desc, activationEvent);
					}
				}
			}
		}
	}