Follow-up Comment #2, patch #4933 (project freeciv):
I have got better results when profiling. Without the patch:
10.48 269.30 269.30 6034611504 0.00 0.00 normalize_map_pos
7.72 467.57 198.27 1074190408 0.00 0.00 pf_normal_map_iterate
7.02 647.97 180.40 209839846 0.00 0.00 pf_fuel_map_iterate
5.44 787.69 139.72 924377761 0.00 0.00 pf_jumbo_map_iterate
4.50 903.37 115.68 8325248516 0.00 0.00 are_reqs_active
4.31 1014.14 110.77 246671460 0.00 0.00
get_fuel_moves_left_req
2.57 1080.12 65.98 3389242058 0.00 0.00 map_is_known_and_seen
2.37 1140.96 60.84 4665055165 0.00 0.00 mapstep
2.28 1199.54 58.58 19112205604 0.00 0.00 genlist_head
2.11 1253.69 54.15 3499063457 0.00 0.00 is_possible_base_fuel
[...]
0.00 2568.45 0.00 1 0.00 0.00
update_nations_with_startpos
-----------------------------------------------
0.16 0.56 348441/246671460 pf_map_new [291]
110.61 395.53 246323019/246671460 pf_fuel_map_iterate [6]
[14] 19.7 110.77 396.08 246671460 get_fuel_moves_left_req [14]
54.15 88.79 3499063457/3499063457 is_possible_base_fuel
[31]
134.06 0.00 3004180578/6034611504 normalize_map_pos [23]
18.72 99.47 3256558157/3391373619 tile_get_known [36]
0.89 0.00 238401421/238403898
map_vector_to_real_distance [341]
-----------------------------------------------
21.43 102.92 46599995/46599995 find_something_to_kill [9]
[35] 4.8 21.43 102.92 46599995 invasion_funct [35]
55.83 0.00 1251036497/6034611504 normalize_map_pos [23]
0.51 27.65 173400395/179506916 dai_diplomacy_get [86]
14.34 3.09 3577616760/12850609884 tile_city [52]
0.52 0.00 361939781/1712405090 city_owner [246]
0.28 0.07 15776297/16347949 base_get_defense_power
[442]
0.34 0.00 188539386/202124883 player_diplstate_get
[445]
0.07 0.00 46599995/2911444067 unit_owner [196]
0.05 0.00 15895384/19112205604 genlist_head [59]
0.01 0.04 18246946/177351059 is_military_unit [421]
0.04 0.00 46599995/2000038149 unit_tile [275]
0.03 0.00 15895384/1397822721 city_tile [242]
0.02 0.00 18246946/22158942239 genlist_link_data [88]
0.01 0.00 18246946/22146923648 genlist_link_next [126]
0.01 0.00 15712070/1023670836 unit_class [373]
0.00 0.00 183314/51700509 city_ai_data [322]
0.00 0.00 183314/1086797480 unit_has_type_flag [259]
0.00 0.00 182001/4476158273 unit_type [179]
-----------------------------------------------
With the patch:
7.59 175.57 175.57 1074190408 0.00 0.00 pf_normal_map_iterate
7.07 339.07 163.50 209839846 0.00 0.00 pf_fuel_map_iterate
6.69 493.82 154.75 22061795161 0.00 0.00 map_pos_to_tile
5.04 610.41 116.59 8325248516 0.00 0.00 are_reqs_active
4.58 716.39 105.98 924377761 0.00 0.00 pf_jumbo_map_iterate
3.07 787.48 71.09 4665055165 0.00 0.00 mapstep
2.68 849.50 62.02 3499063457 0.00 0.00 is_possible_base_fuel
2.62 910.16 60.66 19112205595 0.00 0.00 genlist_head
2.60 970.24 60.08 3389242058 0.00 0.00 map_is_known_and_seen
2.25 1022.30 52.07 10054990814 0.00 0.00 map_move_cost
[...]
0.00 2312.28 0.00 1 0.00 0.00
update_nations_with_startpos
-----------------------------------------------
0.05 0.43 348441/246671460 pf_map_new [286]
38.65 307.13 246323019/246671460 pf_fuel_map_iterate [6]
[17] 15.0 38.70 307.57 246671460 get_fuel_moves_left_req [17]
62.02 87.07 3499063457/3499063457 is_possible_base_fuel
[27]
36.98 93.40 3256558157/3391373619 tile_get_known [31]
27.41 0.00 3908096703/22061795161 map_pos_to_tile [26]
0.69 0.00 238401421/238403898
map_vector_to_real_distance [367]
-----------------------------------------------
7.86 68.37 46599995/46599995 find_something_to_kill [9]
[50] 3.3 7.86 68.37 46599995 invasion_funct [50]
25.64 0.00 3655590811/22061795161 map_pos_to_tile [26]
0.52 23.71 173400395/179506916 dai_diplomacy_get [94]
13.34 3.24 3577616760/12850609884 tile_city [56]
0.83 0.00 361939781/1712405090 city_owner [210]
0.49 0.00 188539386/202124883 player_diplstate_get
[397]
0.24 0.07 15776297/16347949 base_get_defense_power
[460]
0.07 0.00 46599995/2911444067 unit_owner [200]
0.05 0.00 15895384/19112205595 genlist_head [55]
0.01 0.04 18246946/177351059 is_military_unit [422]
0.04 0.00 46599995/2000038149 unit_tile [288]
0.03 0.00 15895384/1397822721 city_tile [234]
0.03 0.00 18246946/22158942239 genlist_link_data [83]
0.01 0.00 18246946/22146923648 genlist_link_next [128]
0.01 0.00 15712070/1023670836 unit_class [387]
0.00 0.00 183314/51700509 city_ai_data [310]
0.00 0.00 183314/1086797480 unit_has_type_flag [250]
0.00 0.00 182001/4476158273 unit_type [188]
-----------------------------------------------
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