# Everyone said this was impossible. ClickHouse is a massive multi-threaded eng...
Canonical: https://social-archive.org/yena/2CpF5Fih10
Original URL: https://x.com/auxten/status/2072232611284762874
Author: auxten
Platform: x
## Content
Everyone said this was impossible. ClickHouse is a massive multi-threaded engine. Porting it to WebAssembly — a single-threaded runtime — was supposed to be a non-starter. Every AI we asked told us the same thing: can't be done. But years of working on this engine gave me a different intuition. From first principles, there was no fundamental barrier. Just a hard problem that everyone had assumed away. So we pointed AI at it — refactor, regress, repeat — instead of taking "impossible" for an answer. The result: http://wasm.chdb.io A full ClickHouse OLAP engine, running entirely in your browser tab. No server. Query local files and S3 Parquet in-process. Huge thanks to @wudidapaopao for the relentless work that made it real.