[IMP] gamification: improve performance of ranks

Purpose
=======
Avoid calling _recompute_rank for users that are not affected by the
newly created/written ranks, by filtering users by karma_min

Task-2746929

closes odoo/odoo#83916

Signed-off-by: Warnon Aurélien (awa) <awa@odoo.com>

addons/gamification/models/gamification_karma_rank.py

@@ -35,8 +35,10 @@ class KarmaRank(models.Model):
     @api.model_create_multi
     def create(self, values_list):
         res = super(KarmaRank, self).create(values_list)
-        users = self.env['res.users'].sudo().search([('karma', '>', 0)])
-        users._recompute_rank()
+        if any(res.mapped('karma_min')) > 0:
+            users = self.env['res.users'].sudo().search([('karma', '>=', max(min(res.mapped('karma_min')), 1))])
+            if users:
+                users._recompute_rank()
         return res
 
     def write(self, vals):
@@ -50,8 +52,8 @@ class KarmaRank(models.Model):
         if 'karma_min' in vals:
             after_ranks = self.env['gamification.karma.rank'].search([], order="karma_min DESC").ids
             if previous_ranks != after_ranks:
-                users = self.env['res.users'].sudo().search([('karma', '>', 0)])
+                users = self.env['res.users'].sudo().search([('karma', '>=', max(low, 1))])
             else:
-                users = self.env['res.users'].sudo().search([('karma', '>=', low), ('karma', '<=', high)])
+                users = self.env['res.users'].sudo().search([('karma', '>=', max(low, 1)), ('karma', '<=', high)])
             users._recompute_rank()
         return res