A complete ClickHouse OLAP engine, compiled to WebAssembly

#1

Post by porridgeraisin » Wed, Jul 01, 2026, 5:05 PM UTC

A complete ClickHouse OLAP engine, compiled to WebAssembly
wasm.chdb.io

Re: A complete ClickHouse OLAP engine, compiled to WebAssembly

#2

Post by maxdo » Wed, Jul 01, 2026, 7:28 PM UTC

Mobile chrome safari not supported , curious why

Re: A complete ClickHouse OLAP engine, compiled to WebAssembly

#3

Post by samwillis » Wed, Jul 01, 2026, 7:31 PM UTC

maxdo wrote: post #2

Mobile chrome safari not supported , curious why

They have compiled to WASM64, the newer 64bit version of WASM. That's not available on iOS yet.

WASM till recently has had a 32bit address space, to match the limitations of JS numbers. With 64bit WASM you have to use BigInt rather than the floats that are numbers in js to address the memory.

It's only the address space that's affected - old WASM still handled 64bit math fine.

Re: A complete ClickHouse OLAP engine, compiled to WebAssembly

#4

Post by eis » Wed, Jul 01, 2026, 7:56 PM UTC

I like the initiative but would love if there was a heavily stripped down version, it seems this one needs to download 95mb+. DuckDB also has a WASM version which is also not tiny but comes in at something like 36mb if I recall correctly.

Re: A complete ClickHouse OLAP engine, compiled to WebAssembly

#5

Post by sourdecor » Wed, Jul 01, 2026, 8:52 PM UTC

Is the point of this privacy, offline analytics, or eliminating server costs, and does that survive the download cost of 95 megabytes?

Re: A complete ClickHouse OLAP engine, compiled to WebAssembly

#6

Post by jamwise » Wed, Jul 01, 2026, 9:23 PM UTC

samwillis wrote: post #3

maxdo wrote: post #2

Mobile chrome safari not supported , curious why

They have compiled to WASM64, the newer 64bit version of WASM. That's not available on iOS yet. WASM till recently has had a 32bit address space, to match the limitations of JS numbers. With 64bit WASM you have to use BigInt rather than the floats that are numbers in js to address the memory. It's only the address space that's affected - old WASM still handled 64bit math fine.

Safari is the new IE

Re: A complete ClickHouse OLAP engine, compiled to WebAssembly

#7

Post by dennis16384 » Wed, Jul 01, 2026, 10:01 PM UTC

People still complain about 95mb download in 2026. It's literally 2 minutes of 1080p youtube watching.

Why bring server software to edge devices? Because its fucking awesome!

Re: A complete ClickHouse OLAP engine, compiled to WebAssembly

#8

Post by mixermachine » Wed, Jul 01, 2026, 10:19 PM UTC

maxdo wrote: post #2

Mobile chrome safari not supported , curious why

Works on Brave (Chromium) with Android 16

Re: A complete ClickHouse OLAP engine, compiled to WebAssembly

#9

Post by glaucon » Wed, Jul 01, 2026, 10:35 PM UTC

I appreciate that in global terms I live a life of data privilege, but I really don't think a 95mb download is any problem at all if the thing I'm downloading has utility.

Re: A complete ClickHouse OLAP engine, compiled to WebAssembly

#10

Post by chatmasta » Wed, Jul 01, 2026, 10:47 PM UTC

sourdecor wrote: post #5

Is the point of this privacy, offline analytics, or eliminating server costs, and does that survive the download cost of 95 megabytes?

WebAssembly doesn’t run only in the browser. WebAssembly runtimes can be effective sandboxing mechanisms for embedded plugins, serverless execution, etc.