[FIX] stock: performance issue inventory at date

On a production database with ~10000 products and multiple stock
locations, uunning the 'Inventory at date' tales ~50 minutes. Most of
the time is spent in the loop populating `group_lines` thanks to
multiple search queries.

We get rid of this loop by selecting the stock history lines and making
the match between these lines and the `read_group` result manually. On
the reference database, the duration falls to ~30 seconds.

Based on preliminary work by amoyaux

opw-803460

0 files changed, 0 insertions, 0 deletions