translation/source/documents/course/04-workflows/15-creating-parallel-steps.md

Creating Parallel Steps

Let's create three analysis steps that can run simultaneously to analyze different aspects of content.

Creating the Analysis Steps

Add these three steps to your workflow file:

// SEO Analysis
const seoAnalysisStep = createStep({
  id: "seo-analysis",
  description: "SEO optimization analysis",
  inputSchema: z.object({
    content: z.string(),
    type: z.enum(["article", "blog", "social"]).default("article"),
  }),
  outputSchema: z.object({
    seoScore: z.number(),
    keywords: z.array(z.string()),
  }),
  execute: async ({ inputData }) => {
    console.log("🔍 Running SEO analysis...");
    await new Promise((resolve) => setTimeout(resolve, 800));

    const words = inputData.content.toLowerCase().split(/\s+/);
    const keywords = words.filter((word) => word.length > 4).slice(0, 3);

    return {
      seoScore: Math.floor(Math.random() * 40) + 60,
      keywords,
    };
  },
});

// Readability Analysis
const readabilityStep = createStep({
  id: "readability-analysis",
  description: "Content readability analysis",
  inputSchema: z.object({
    content: z.string(),
    type: z.enum(["article", "blog", "social"]).default("article"),
  }),
  outputSchema: z.object({
    readabilityScore: z.number(),
    gradeLevel: z.string(),
  }),
  execute: async ({ inputData }) => {
    console.log("📖 Running readability analysis...");
    await new Promise((resolve) => setTimeout(resolve, 600));

    const sentences = inputData.content.split(/[.!?]+/).length;
    const words = inputData.content.split(/\s+/).length;
    const avgWordsPerSentence = words / sentences;

    const score = Math.max(0, 100 - avgWordsPerSentence * 3);
    const gradeLevel = score > 80 ? "Easy" : score > 60 ? "Medium" : "Hard";

    return {
      readabilityScore: Math.floor(score),
      gradeLevel,
    };
  },
});

// Sentiment Analysis
const sentimentStep = createStep({
  id: "sentiment-analysis",
  description: "Content sentiment analysis",
  inputSchema: z.object({
    content: z.string(),
    type: z.enum(["article", "blog", "social"]).default("article"),
  }),
  outputSchema: z.object({
    sentiment: z.enum(["positive", "neutral", "negative"]),
    confidence: z.number(),
  }),
  execute: async ({ inputData }) => {
    console.log("😊 Running sentiment analysis...");
    await new Promise((resolve) => setTimeout(resolve, 700));

    const content = inputData.content.toLowerCase();
    const positiveWords = ["good", "great", "excellent", "amazing"];
    const negativeWords = ["bad", "terrible", "awful", "horrible"];

    const positive = positiveWords.filter((word) =>
      content.includes(word),
    ).length;
    const negative = negativeWords.filter((word) =>
      content.includes(word),
    ).length;

    let sentiment: "positive" | "neutral" | "negative" = "neutral";
    if (positive > negative) sentiment = "positive";
    if (negative > positive) sentiment = "negative";

    return {
      sentiment,
      confidence: Math.random() * 0.3 + 0.7, // 0.7-1.0
    };
  },
});

Notice the Timing

Each step has a different simulated processing time:

• SEO: 800ms
• Readability: 600ms
• Sentiment: 700ms

When run sequentially, total time would be ~2.2 seconds. When run in parallel, total time will be ~800ms (the longest step)!

Next, you'll learn how to run these steps in parallel using the .parallel() method.