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How to Fix Kafka to ClickHouseÂź Performance Bottlenecks
Originally from tinybird.co/blog-posts
December 30, 2025 ‱ Roasted by Marcus "Zero Trust" Williams Read Original Article

Ah, a truly delightful read. It’s always so refreshing to see engineers with such a pure, unburdened focus on performance. It takes a special kind of courage to write an entire article on a data pipeline and not once mention trivial distractions like authentication, authorization, or encryption in transit. A bold choice, and one I’m sure your future incident response team will appreciate.

I must commend the focus on schema optimization. It’s a wonderfully efficient approach. By stripping down data types and constraints to their bare minimum for the sake of ingestion speed, you’re also streamlining the process for potential data poisoning attacks. Why force an attacker to craft a complex payload when you’ve already relaxed the validation rules for them? It's just considerate. Every permissive schema is a CVE waiting to be assigned, and I, for one, love the job security.

And the section on Materialized View tuning? Simply inspired. Creating pre-computed, aggregated views of your data is a fantastic way to improve query latency. It’s also a fantastic way to create a secondary, often less-monitored, repository of potentially sensitive information for an attacker to exfiltrate. Why steal the whole database when a convenient, high-value summary is available? It’s the data breach equivalent of an executive summary, and it shows a real respect for the attacker’s time.

Your thoughts on partition distribution strategies were particularly insightful. Carefully organizing data into logical partitions is great for query performance. It’s also a dream for compliance auditors and malicious actors alike. You’ve essentially created a neatly labeled filing cabinet of PII.

An attacker won't have to guess where the valuable customer data is; they can just query the customers_europe_prod partition you've so helpfully optimized for rapid access. It’s a roadmap to your crown jewels. GDPR has never been so easy to violate at scale.

But my favorite part was the dedication to throughput best practices. This is where the magic really happens. This is the part of the presentation where someone inevitably suggests turning off "unnecessary" overhead. You know, little things like:

You’re not just building a data pipeline; you're building a high-speed, frictionless data exfiltration superhighway. The sheer volume of data you'll be able to leak per second is, and I don't say this lightly, a new paradigm in operational efficiency. I can already see the SOC 2 audit report. The list of exceptions will be longer than the article itself. It'll be a masterpiece of non-compliance.

Thank you for this... perspective. It’s a wonderful reminder of what can be achieved when you treat security as a theoretical concept rather than a practical requirement. I’ll be filing this under “Exhibits for the Board Meeting That Follows the Breach.”

I will certainly not be reading this blog again, but I wish you the best of luck with your RCE-as-a-Service platform. It looks promising.