Generating 1200x1200 10,000 unique images in lambda.

// generate images from layers
      const canvas = createCanvas(dimension.width, dimension.height);
      const ctx = canvas.getContext("2d");
  
      for (let i = 0; i < metadata.length; i++) {
        console.info(`<${userId}>`, `generated image #${i}`);
        ctx.clearRect(0, 0, dimension.width, dimension.height);
  
        const data = metadata[i];
        const traitImages = data.attributes.map((attr) =>
          layerMap.get(attr.trait_type + attr.value),
        );
  
        for (const image of traitImages) {
          ctx.drawImage(image, 0, 0, dimension.width, dimension.height);
        }
  
        archive.append(canvas.toBuffer("image/png"), { name: `images/${i}.${format}` });

        // if divisible by 5 update status
        if (i % 5 === 0) {
          await collection.updateOne({ userId }, { $set: { status: i.toString() } });
        }
      }
      console.info(`<${userId}>`, "generated images");
      await collection.updateOne({ userId }, { $set: { status: "processed" } });