Create 120k cubes in Blender 3.4 alpha: selection is broken (b key and select some region of cubes) and deletion (select all 'a', delete 'x') takes very long.

cube.py

#See Aras' post, https://twitter.com/aras_p/status/1579383862165405696
import time
import bpy
print("hello world")
mesh = bpy.data.meshes['Cube']
start = time.time()
for z in range (0,7,3):
  for x in range(-9,10):
    for y in range(-9,10):
        ob = bpy.data.objects.new("Gen", object_data=mesh)
        ob.location.x = x*2.1
        ob.location.y = y*2.1
        ob.location.z = z
        bpy.context.collection.objects.link(ob)
  end = time.time()
  print("Generated in ", end-start," sec")
  start = end