odoo/o-spreadsheet#4531

Created by BI, Alexis Lacroix (laa)

Blocked

label
odoo:master-perf-getImportedSheetSize-laa
head
852aaae000d2b1b59e17012b96c8a0b1bb5c0dbb
odoo/o-spreadsheet
master #4531 missing r+

Master perf get imported sheet size laa

This commit tries to imp 'getImportedSheetSize' calculation
self time. (that represents 2.5 % of 'createModel')

With the ref we save: ~30% calculation time

Task: : 4022900