Improve pty host startup marks/logging

Part of microsoft#185393

Author: Tyriar

src/vs/platform/terminal/node/ptyService.ts

@@ -506,7 +506,6 @@ export class PtyService extends Disposable implements IPtyService {
 		if (layout) {
 			const expandedTabs = await Promise.all(layout.tabs.map(async tab => this._expandTerminalTab(tab)));
 			const tabs = expandedTabs.filter(t => t.terminals.length > 0);
-			this._logService.trace('PtyService.getTerminalLayoutInfo result', tabs);
 			performance.mark('code/didGetTerminalLayoutInfo');
 			return { tabs };
 		}

src/vs/workbench/contrib/terminal/electron-sandbox/localTerminalBackend.ts

@@ -94,10 +94,10 @@ class LocalTerminalBackend extends BaseTerminalBackend implements ITerminalBacke
 		// The pty host should not get launched until the first window restored phase
 		await this._lifecycleService.when(LifecyclePhase.Restored);
 
-		mark('code/willConnectPtyHost');
+		mark('code/terminal/willConnectPtyHost');
 		this._logService.trace('Renderer->PtyHost#connect: before acquirePort');
 		acquirePort('vscode:createPtyHostMessageChannel', 'vscode:createPtyHostMessageChannelResult').then(port => {
-			mark('code/didConnectPtyHost');
+			mark('code/terminal/didConnectPtyHost');
 			this._logService.trace('Renderer->PtyHost#connect: connection established');
 			// There are two connections to the pty host; one to the regular shared process
 			// _localPtyService, and one directly via message port _ptyHostDirectProxy. The former is
@@ -279,18 +279,24 @@ class LocalTerminalBackend extends BaseTerminalBackend implements ITerminalBacke
 
 				// Re-resolve the environments and replace it on the state so local terminals use a fresh
 				// environment
+				mark('code/terminal/willGetReviveEnvironments');
 				for (const state of parsed) {
 					const freshEnv = await this._resolveEnvironmentForRevive(variableResolver, state.shellLaunchConfig);
 					state.processLaunchConfig.env = freshEnv;
 				}
+				mark('code/terminal/didGetReviveEnvironments');
 
+				mark('code/terminal/willReviveTerminalProcesses');
 				await this._localPtyService.reviveTerminalProcesses(parsed, Intl.DateTimeFormat().resolvedOptions().locale);
+				mark('code/terminal/didReviveTerminalProcesses');
 				this._storageService.remove(TerminalStorageKeys.TerminalBufferState, StorageScope.WORKSPACE);
 				// If reviving processes, send the terminal layout info back to the pty host as it
 				// will not have been persisted on application exit
 				const layoutInfo = this._storageService.get(TerminalStorageKeys.TerminalLayoutInfo, StorageScope.WORKSPACE);
 				if (layoutInfo) {
+					mark('code/terminal/willSetTerminalLayoutInfo');
 					await this._localPtyService.setTerminalLayoutInfo(JSON.parse(layoutInfo));
+					mark('code/terminal/didSetTerminalLayoutInfo');
 					this._storageService.remove(TerminalStorageKeys.TerminalLayoutInfo, StorageScope.WORKSPACE);
 				}
 			} catch {