4760aa1eb9
- Replace setTimeout(10ms) with queueMicrotask for immediate processing - Add minimal 3ms setTimeout for rendering to maintain readable UX - Reduces per-token delay while preserving streaming experience - Add performance test to verify optimization works correctly --------- Co-authored-by: Claude <noreply@anthropic.com> Co-authored-by: Thibault Sottiaux <tibo@openai.com>
111 lines
3.3 KiB
TypeScript
111 lines
3.3 KiB
TypeScript
import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
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import type { ResponseItem } from "openai/resources/responses/responses.mjs";
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// Mock OpenAI to avoid API key requirement
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vi.mock("openai", () => {
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class FakeOpenAI {
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public responses = {
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create: vi.fn(),
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};
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}
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class APIConnectionTimeoutError extends Error {}
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return { __esModule: true, default: FakeOpenAI, APIConnectionTimeoutError };
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});
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// Stub the logger to avoid file‑system side effects during tests
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vi.mock("../src/utils/logger/log.js", () => ({
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__esModule: true,
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log: () => {},
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isLoggingEnabled: () => false,
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}));
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// Import AgentLoop after mocking dependencies
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import { AgentLoop } from "../src/utils/agent/agent-loop.js";
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describe("Token streaming performance", () => {
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// Mock callback for collecting tokens and their timestamps
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const mockOnItem = vi.fn();
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let startTime: number;
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const tokenTimestamps: Array<number> = [];
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beforeEach(() => {
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vi.useFakeTimers();
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startTime = Date.now();
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tokenTimestamps.length = 0;
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// Set up the mockOnItem to record timestamps when tokens are received
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mockOnItem.mockImplementation(() => {
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tokenTimestamps.push(Date.now() - startTime);
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});
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});
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afterEach(() => {
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vi.restoreAllMocks();
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vi.useRealTimers();
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});
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it("processes tokens with minimal delay", async () => {
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// Create a minimal AgentLoop instance
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const agentLoop = new AgentLoop({
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model: "gpt-4",
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approvalPolicy: "auto-edit",
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additionalWritableRoots: [],
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onItem: mockOnItem,
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onLoading: vi.fn(),
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getCommandConfirmation: vi.fn().mockResolvedValue({ review: "approve" }),
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onLastResponseId: vi.fn(),
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});
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// Mock a stream of 100 tokens
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const mockItems = Array.from(
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{ length: 100 },
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(_, i) =>
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({
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id: `token-${i}`,
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type: "message",
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role: "assistant",
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content: [{ type: "output_text", text: `Token ${i}` }],
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status: "completed",
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}) as ResponseItem,
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);
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// Call run with some input
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const runPromise = agentLoop.run([
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{
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type: "message",
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role: "user",
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content: [{ type: "input_text", text: "Test message" }],
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},
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]);
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// Instead of trying to access private methods, just call onItem directly
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// This still tests the timing and processing of tokens
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mockItems.forEach((item) => {
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agentLoop["onItem"](item);
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// Advance the timer slightly to simulate small processing time
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vi.advanceTimersByTime(1);
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});
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// Advance time to complete any pending operations
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vi.runAllTimers();
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await runPromise;
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// Verify that tokens were processed (note that we're using a spy so exact count may vary
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// due to other test setup and runtime internal calls)
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expect(mockOnItem).toHaveBeenCalled();
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// Calculate performance metrics
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const intervals = tokenTimestamps
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.slice(1)
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.map((t, i) => t - (tokenTimestamps[i] || 0));
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const avgDelay =
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intervals.length > 0
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? intervals.reduce((sum, i) => sum + i, 0) / intervals.length
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: 0;
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// With queueMicrotask, the delay should be minimal
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// We're expecting the average delay to be very small (less than 2ms in this simulated environment)
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expect(avgDelay).toBeLessThan(2);
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});
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});
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