Freeing/Shrinking memory · Issue #1300 · WebAssembly/design (original) (raw)

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Description

I have a Wasm project which parses a large chunk of textual data (~40mb). First, I reserve enough space to write the data over to Wasm's memory. Next, I run the Wasm module and process the data.

The problem is, that freeing the input/output memory doesn't actually shrink Wasm's memory. The memory keeps growing based on the largest allocation. In my project, I eventually end up having +200mb of wasted RAM.

• Are there any plans to support memory shrinking?
• I would be fine with a way to explicitly destroy a Wasm instance (so garbage collecting all its memory), but couldn't find one