Inference costs have dropped 280x in 18 months. This should mean cheaper AI, right? Wrong. Jevons Paradox has kicked in: as AI gets cheaper, we use it exponentially more. The hidden cost isn't the inference itself; it's the massive waste of re-computing data you've already processed.
The Jevons Paradox in AI#
When processing one hour of video cost $100, enterprises processed only critical security footage. At <$0.10/hour, they process everything: every Zoom call, marketing asset, and QA log.
This volume explosion breaks the "script-based" architecture of the last decade. Pipelines that worked for 100 files fail catastrophically at 100 million. But the real budget killer is subtle: redundant computation.
The Hidden Cost of Re-computation#
Imagine you have 10,000 hours of video. You've extracted frames and generated embeddings using CLIP. Now, you want to:
- Change the frame extraction rate from 1fps to 2fps.
- Update the embedding model to a newer version.
- Fix a bug in your metadata extraction logic.
In a traditional pipeline (Airflow + Scripts), you often have to re-run the entire pipeline. You can't easily say "only re-compute the frames that are missing" or "only update embeddings for videos added last week."
The Math:
10,000 hours * 60 mins * 60 secs = 36M seconds.
Processing at 1fps = 36M frames.
If you re-run everything, you pay for 36M inferences again.
Incremental View Maintenance (IVM)#
This is a solved problem in the database world. It's called Incremental View Maintenance. When you update a row in a SQL database, the materialized views update automatically, but only the affected rows are recomputed.
Pixeltable brings IVM to unstructured data and AI models.
In this scenario, Pixeltable knows it already has frames for t=0, t=1, t=2... It only computes the new frames for t=0.5, t=1.5, etc. You save 50% of your compute instantly.
Feature-Level Cost Attribution#
Another major pain point for engineering leaders (like those at Adobe and Rosnik) is cost attribution. "How much did the 'smart search' feature cost us last month?"
Because Pixeltable tracks the lineage of every computed column, cost attribution becomes a simple query:
Stop Burning GPU Cycles#
As your data volume grows, "re-run everything" stops being a viable strategy. It's too slow and too expensive. You need infrastructure that is incremental by default.
Pixeltable's architecture ensures you never pay for the same inference twice. It's not just a technical optimization; it's a fundamental requirement for the economics of modern AI.
Further Reading#
- AI Transformations Belong in the Schema: why IVM works when AI transformations are part of the table definition
- Dependency Graph Magic: how computed columns track and propagate changes
- Schema-Driven Infrastructure: the broader architecture that makes incremental computation automatic
