Original bug ID: 5762
Reporter: @chambart
Assigned to: @lefessan
Status: closed (set by @xavierleroy on 2015-12-11T18:08:20Z)
Resolution: fixed
Priority: normal
Severity: feature
Version: 4.00.0
Fixed in version: 4.01.0+dev
Category: back end (clambda to assembly)
Monitored by: @chambart @hcarty

Bug description

Bigarray.Array1.dim is a generic C function that may be called a lot when doing IO using bigarrays. It is a lot slower than what can be done directly in cmm.

I provide a patch to add the primitives for Array1,Array2 and Array3 modules.

The loop:

for i = 0 to n do
ignore (Array1.dim a);
done

is close to 10 times faster with the patch.

File attachments

• patch
• patch2