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Overview

Auto-pipelining automatically batches multiple Redis commands into a single HTTP request, providing the performance benefits of manual pipelining without requiring explicit pipeline management.

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How it works

When auto-pipelining is enabled (the default), commands issued in the same event loop tick are automatically batched: 
import { Redis } from "@upstash/redis";

const redis = new Redis({
  url: process.env.UPSTASH_REDIS_REST_URL!,
  token: process.env.UPSTASH_REDIS_REST_TOKEN!,
  enableAutoPipelining: true, // enabled by default
});

// These three commands execute in the same tick
// They're automatically batched into a single HTTP request
const promise1 = redis.set("key1", "value1");
const promise2 = redis.set("key2", "value2");
const promise3 = redis.get("key1");

// Wait for all results
const [result1, result2, result3] = await Promise.all([promise1, promise2, promise3]);
console.log(result1); // "OK"
console.log(result2); // "OK"
console.log(result3); // "value1"
Internally, the SDK:
  1. Collects all commands issued in the current tick
  2. Waits for the next tick (using Promise.resolve().then())
  3. Sends all collected commands in a single batch
  4. Returns individual results to each promise

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Enabling auto-pipelining

Auto-pipelining is enabled by default. To explicitly enable or disable: 
// Enabled (default)
const redis = new Redis({
  url: process.env.UPSTASH_REDIS_REST_URL!,
  token: process.env.UPSTASH_REDIS_REST_TOKEN!,
  enableAutoPipelining: true,
});

// Disabled
const redis = new Redis({
  url: process.env.UPSTASH_REDIS_REST_URL!,
  token: process.env.UPSTASH_REDIS_REST_TOKEN!,
  enableAutoPipelining: false,
});
When disabled, each command executes as an individual HTTP request.

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Usage patterns

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Parallel operations

Execute multiple independent commands efficiently: 
// All three commands are batched automatically
const [user, settings, posts] = await Promise.all([
  redis.get("user:123"),
  redis.hgetall("user:123:settings"),
  redis.lrange("user:123:posts", 0, 10),
]);

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Sequential with batching

Issue commands sequentially in the same tick: 
async function updateUserStats(userId: string) {
  // All issued in the same tick, automatically batched
  const incrPromise = redis.incr(`user:${userId}:visits`);
  const setPromise = redis.set(`user:${userId}:last-seen`, Date.now());
  const saddPromise = redis.sadd("active-users", userId);
  
  // Wait for all to complete
  await Promise.all([incrPromise, setPromise, saddPromise]);
}

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JSON operations

JSON commands are also auto-pipelined: 
// Batched automatically
const [setResult, getName, getScores] = await Promise.all([
  redis.json.set("user:1", "$", { name: "Alice", scores: [10, 20, 30] }),
  redis.json.get("user:1", "$.name"),
  redis.json.get("user:1", "$.scores"),
]);

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When commands are batched

Commands are batched when issued in the same event loop tick: 
// ✅ Batched - same tick
const p1 = redis.set("a", 1);
const p2 = redis.set("b", 2);
await Promise.all([p1, p2]);

// ❌ Not batched - different ticks
await redis.set("a", 1);
await redis.set("b", 2);

// ✅ Batched - both issued before awaiting
const p3 = redis.set("c", 3);
await somethingElse(); // Some other async operation
const p4 = redis.set("d", 4);
await Promise.all([p3, p4]); // Still batched if in same tick

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Performance comparison

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Without auto-pipelining

const redis = new Redis({
  url,
  token,
  enableAutoPipelining: false,
});

// 3 separate HTTP requests
await redis.set("key1", "value1"); // Request 1: ~50ms
await redis.set("key2", "value2"); // Request 2: ~50ms
await redis.get("key1");            // Request 3: ~50ms
// Total: ~150ms

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With auto-pipelining

const redis = new Redis({
  url,
  token,
  enableAutoPipelining: true, // default
});

// 1 batched HTTP request
const p1 = redis.set("key1", "value1");
const p2 = redis.set("key2", "value2");
const p3 = redis.get("key1");
await Promise.all([p1, p2, p3]);
// Total: ~50ms

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Monitoring pipeline batches

Track how many pipeline batches have been executed: 
const redis = new Redis({
  url,
  token,
  enableAutoPipelining: true,
}) as Redis & { pipelineCounter: number };

// Issue some commands
const p1 = redis.set("a", 1);
const p2 = redis.set("b", 2);
await Promise.all([p1, p2]);

console.log(redis.pipelineCounter); // 1

// Issue more commands
const p3 = redis.set("c", 3);
const p4 = redis.set("d", 4);
await Promise.all([p3, p4]);

console.log(redis.pipelineCounter); // 2

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Error handling

Each command’s promise resolves or rejects individually: 
const p1 = redis.set("key1", "value1");
const p2 = redis.incr("key1"); // Will fail: not an integer
const p3 = redis.get("key2");

try {
  await p1; // Succeeds
  console.log("Set succeeded");
} catch (error) {
  console.error("Set failed", error);
}

try {
  await p2; // Fails
  console.log("Incr succeeded");
} catch (error) {
  console.error("Incr failed", error); // This will be caught
}

try {
  await p3; // Succeeds
  console.log("Get succeeded");
} catch (error) {
  console.error("Get failed", error);
}

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Excluded commands

Some commands cannot be auto-pipelined and always execute individually:
  • scan, hscan, sscan, zscan - Cursor-based iteration
  • keys - Returns all keys
  • hgetall, hkeys - May return large datasets
  • lrange - May return large ranges
  • smembers - Returns all set members
  • zrange - May return large ranges
  • xrange, xrevrange - Stream ranges
  • flushdb, flushall - Destructive operations
  • dbsize - Database-wide operation
  • exec - Transaction execution
These commands execute as individual requests regardless of auto-pipelining settings.

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Auto-pipeline vs manual pipeline

FeatureAuto-pipelineManual pipeline
SetupAutomaticExplicit .pipeline()
SyntaxNaturalChained or sequential
Type inferenceFullFull (when chained)
ControlImplicit batchingExplicit batching
Error handlingIndividual promisesArray or keepErrors
Use caseGeneral developmentFine-grained control

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When to use auto-pipeline

  • Default choice for most applications
  • Serverless functions with multiple commands
  • Simplified code without manual pipeline management
  • When batching can happen naturally via Promise.all()

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When to use manual pipeline

  • Need explicit control over batch boundaries
  • Want to see exactly which commands are batched
  • Building complex batch operations
  • Need transaction semantics with multi()

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Real-world example

Serverless function with auto-pipelining: 
import { Redis } from "@upstash/redis";

const redis = new Redis({
  url: process.env.UPSTASH_REDIS_REST_URL!,
  token: process.env.UPSTASH_REDIS_REST_TOKEN!,
  enableAutoPipelining: true,
});

export async function handler(event: { userId: string; action: string }) {
  const { userId, action } = event;
  
  // All these commands are automatically batched into a single request
  const incrementPromise = redis.incr(`user:${userId}:actions`);
  const timestampPromise = redis.set(`user:${userId}:last-action`, Date.now());
  const logPromise = redis.lpush(`user:${userId}:log`, action);
  const addActivePromise = redis.sadd("active-users", userId);
  
  // Wait for all operations
  await Promise.all([
    incrementPromise,
    timestampPromise,
    logPromise,
    addActivePromise,
  ]);
  
  return { success: true };
}
// Total latency: 1 HTTP request instead of 4

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Best practices

  1. Issue commands before awaiting: Let the SDK collect multiple commands 
    // Good
const p1 = redis.set("a", 1);
const p2 = redis.set("b", 2);
await Promise.all([p1, p2]);

// Bad - not batched
await redis.set("a", 1);
await redis.set("b", 2);
  2. Use Promise.all() for parallel operations 
    const results = await Promise.all([
  redis.get("key1"),
  redis.get("key2"),
  redis.get("key3"),
]);
  3. Handle errors individually 
    const promises = [
  redis.set("a", 1).catch(e => ({ error: e })),
  redis.set("b", 2).catch(e => ({ error: e })),
];
const results = await Promise.all(promises);
  4. Monitor pipeline efficiency in development 
    if (process.env.NODE_ENV === "development") {
  const redis = new Redis({ url, token }) as Redis & { pipelineCounter: number };
  // Log pipeline count periodically
}

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