Lean 3

- pre500  : 0.87s
- pre1000 : 0.99s
- pre1500 : 1.15s
- pre2000 : 1.30s
- pre2500 : 1.46s
- pre3000 : 1.60s

- simp500  : 1.76s   (0.89s simp time)
- simp1000 : 3.96s   (2.97s simp time)
- simp1500 : 7.82s   (6.67s simp time)
- simp2000 : 13.16s  (11.86s simp time)
- simp2500 : 19.71s  (18.25s simp time)
- simp3000 : 28.50s  (26.90s simp time)

Lean 4 (using `-DmaxRecDepth=100000`)

- pre500  : 0.32s
- pre1000 : 0.56s
- pre1500 : 0.79s
- pre2000 : 1.05s
- pre2500 : 1.35s
- pre3000 : 1.60s

- simp500  : 0.50s   (0.18s simp time)
- simp1000 : 0.95s   (0.39s simp time)
- simp1500 : 1.40s   (0.61s simp time)
- simp2000 : 1.76s   (0.71s simp time)
- simp2500 : 2.28s   (0.93s simp time)
- simp3000 : 2.75s   (1.15s simp time)