Latency—Why Telegram’s CEO Just Brought It Up, and Why It’s a Big Deal 🔥
I'm Rudraksh Laddha — a DevOps engineer and emerging full-stack developer, passionate about building scalable, reliable systems that solve real-world problems.
With a solid foundation in cloud infrastructure automation using tools like Kubernetes, Docker, Terraform, and AWS, I thrive in environments where efficiency, resilience, and automation are key.
But my journey doesn't stop at infrastructure. I'm actively expanding into full-stack development, building dynamic applications using React, Node.js, and MongoDB. Whether it's designing cloud-native CI/CD pipelines or developing intuitive user interfaces, I enjoy creating end-to-end solutions — from server to screen.
Right now, I'm: 🧩 Building full-stack applications that merge DevOps reliability with engaging frontend experiences 🛠️ Contributing to open-source projects, learning through collaboration and real-world scenarios 🚀 Growing Virendana Ui, my own UI library focused on expressive, clean design systems 🚀 Growing Learn Virendana, where I share my personalized learning journey — from beginner to experienced 🎮 Developing side projects like 2048 Rush, blending product thinking with scalable infrastructure My long-term goal? To bridge DevOps and development — building products that are not just functional and fast, but also resilient, beautiful, and ready for scale.
If you use Telegram regularly, you might have heard its CEO warning about latency. And you might have shrugged.
But latency isn’t just a buzzword — it can make or break user experience. Let’s dig in.
What Did Telegram’s CEO Say — and Why It Matters
On a recent podcast, Pavel Durov stressed something many founders ignore: when millions of users open your app a dozen times a day, even 50 ms of extra latency adds up. (LinkedIn)
He isn’t talking about a feature delay or UI bug — he’s talking about raw responsiveness.
For a global messaging app with hundreds of millions of users, that delay turns into frustration. That is not acceptable.
Durov built Telegram on two principles: privacy and real-time communication. (Lex Fridman)
If your message, notification, or chat takes noticeable time to reach the other side — the whole purpose collapses.
That’s why, from him, latency is not a “nice-to-have.” It is the core metric of trust, speed and reliability.
What is Latency — Plain English, Expert View
In engineering, latency simply means the time gap between “you do something” and “the system responds.” (Wikipedia)
In context of chat/messaging apps (or any real-time system):
It’s the time between you hit “send” and the other side receives the message (or sees the typing indicator, or gets notified). (Sceyt)
In networking terms, it includes many small delays:
When you add all these micro-delays, cumulative latency can hurt real-time feels.
What is “Good” Latency — How Fast Should It Be
From what engineers and real-time communication designers consider:
For chat or messaging: you want latency to be very small — ideally so small the user doesn’t notice. (Sceyt)
For voice/video calls or interactive apps: often target sub-150 ms one-way for smooth feel. (Stream)
Above ~200 ms (or more, depending on network & load): delay becomes noticeable → leads to lag, awkwardness, or poor experience. (Obkio)
In short: lower latency → faster, seamless real-time response → better user experience.
Why Low Latency Is Critical for Telegram (Or Any Real-Time Messaging App)
✅ Instant Communication — The Promise
When you send a message on Telegram: you expect it to reach instantly.
No lag. No waiting. No “where did it go?”.
That expectation becomes baseline when users are used to lightning-fast chats, instant replies, real-time notifications. If latency is high — even a fraction — users feel it.
✅ Huge Scale — Amplifies Delay
Telegram serves billions of users. (Lex Fridman)
When millions of users open and exchange messages every second — even milliseconds of delay get magnified massively.
Durov knows that when scale is big, the tiniest delay becomes noticeable, annoying, and harmful to user trust.
✅ Reliability Under Load
At peak time, network congestion, server load, routing delays, distance — all can contribute to latency.
If architecture and infrastructure are not optimized for low latency, chats delay. Notifications miss. Real-time features fail.
For a privacy-centric messenger, delays kill user confidence.
What Happens When Latency Is High — The Risks & Real Effects
Slow message delivery — user may see “sent” but the other user receives after delay → “Why didn’t they reply?” confusion.
Broken real-time features — typing indicator, message read receipts, live voice/video calls all feel laggy or fail.
Poor user experience — frequent delays make app feel sluggish; users may switch to faster alternatives.
Scalability issues — as user base grows, delays amplify, system becomes brittle, harder to maintain performance.
Trust & reputation damage — for an app promising privacy + speed, high latency means broken promise.
What Builders / Developers Should Learn from This
If you build any real-time system (chat, gaming, live collaboration, notifications):
Prioritize low latency architecture. Do not treat latency as secondary.
Optimize network: choose data-centers closer to users, efficient protocols, minimal hops.
Keep message sizes small; avoid bulky payloads for core real-time messages. (Chronicle Software)
Use scalable backend that handles peak load without queuing — because queueing introduces delay.
Monitor and benchmark end-to-end latency (not just server processing) — from user action to delivery.
Final Word (In My Style)
Latency — call it delay, lag, or slowdown — is the silent killer of user experience.
When you build something real-time, you are not just building features. You’re building trust, speed, responsiveness.
That’s why Pavel Durov and Telegram talk about latency.
Because when you serve billions — a 50 ms lag is not negligible. It’s a deal breaker.
If you build chat apps, gaming apps, real-time dashboards, or anything that demands instant response — don’t treat latency as “nice to have.”
Treat it like core architecture principle.
Because in real-time, if you delay — you fail.
