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quiescence optimisations #43

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@andtsa andtsa commented Aug 21, 2025

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github-actions bot commented Aug 21, 2025

d6 benchmark results:

d6 on TARGET branch:
--------------------
�[1m�[32m    Finished�[0m `test` profile [unoptimized + debuginfo] target(s) in 0.07s
�[1m�[32m     Running�[0m tests/d6.rs (target/debug/deps/d6-fd436cfa4021ab6f)

running 1 test
[*] creating engine at version 0.6.3
[*] tt: created VL table with 8 entries.
[*] Entering UCI mode
engine_info (0ms): info string entering uci mode
[*] uci: option use_tt set to on.
engine_info (13ms): info depth 1 seldepth 0 multipv 1 nodes 60 nps 82578 hashfull 0 tbhits 0 time 0 score cp 10 pv d2d4
engine_info (13ms): info depth 2 seldepth 1 multipv 1 nodes 898 nps 293751 hashfull 750 tbhits 0 time 3 score cp 25 pv g1f3 g8f6
engine_info (23ms): info depth 3 seldepth 4 multipv 1 nodes 4701 nps 312121 hashfull 1000 tbhits 0 time 15 score cp 10 pv g1f3 g8f6 d2d4
engine_info (94ms): info depth 4 seldepth 6 multipv 1 nodes 29225 nps 322779 hashfull 1000 tbhits 3 time 90 score cp 25 pv g1f3 d7d5 d2d4 g8f6
engine_info (517ms): info depth 5 seldepth 9 multipv 1 nodes 158117 nps 312174 hashfull 1000 tbhits 4 time 506 score cp 8 pv g1f3 d7d5 d2d4 g8f6 b1c3
engine_info (2731ms): info depth 6 seldepth 10 multipv 1 nodes 907198 nps 332488 hashfull 1000 tbhits 10 time 2728 score cp 25 pv g1f3 d7d5 d2d4 b8c6 b1c3 g8f6 c3d5
Best move: g1f3
 duration: 2892ms 
 max depth: 6
 total nodes searched: 1100199
killing child
test main ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.89s

********************
 
d6 on SOURCE branch:
--------------------
�[1m�[32m   Compiling�[0m chesseng v0.6.3 (/home/runner/work/chesseng/chesseng)
�[1m�[32m    Finished�[0m `test` profile [unoptimized + debuginfo] target(s) in 1.99s
�[1m�[32m     Running�[0m tests/d6.rs (target/debug/deps/d6-fd436cfa4021ab6f)

running 1 test
[*] creating engine at version 0.6.3
[*] tt: created VL table with 8 entries.
[*] Entering UCI mode
engine_info (0ms): info string entering uci mode
[*] uci: option use_tt set to on.
engine_info (14ms): info depth 1 seldepth 0 multipv 1 nodes 60 nps 88903 hashfull 0 tbhits 0 time 0 score cp 10 pv d2d4
engine_info (14ms): info depth 2 seldepth 1 multipv 1 nodes 896 nps 290819 hashfull 750 tbhits 0 time 3 score cp 25 pv g1f3 g8f6
engine_info (23ms): info depth 3 seldepth 4 multipv 1 nodes 4436 nps 314549 hashfull 1000 tbhits 0 time 14 score cp 10 pv g1f3 g8f6 d2d4
engine_info (84ms): info depth 4 seldepth 5 multipv 1 nodes 28030 nps 340742 hashfull 1000 tbhits 0 time 82 score cp 25 pv g1f3 d7d5 d2d4 g8f6
engine_info (509ms): info depth 5 seldepth 9 multipv 1 nodes 156973 nps 312540 hashfull 1000 tbhits 0 time 502 score cp 8 pv g1f3 d7d5 d2d4 g8f6 b1c3
engine_info (2769ms): info depth 6 seldepth 10 multipv 1 nodes 937217 nps 338887 hashfull 1000 tbhits 2 time 2765 score cp 25 pv g1f3 d7d5 d2d4 b8c6 b1c3 g8f6 c3d5
Best move: g1f3
 duration: 2931ms 
 max depth: 6
 total nodes searched: 1127612
killing child
test main ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.93s

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github-actions bot commented Aug 21, 2025

prune benchmark results:

prune on TARGET branch:
-----------------------
�[1m�[32m    Finished�[0m `test` profile [unoptimized + debuginfo] target(s) in 0.07s
�[1m�[32m     Running�[0m tests/prune.rs (target/debug/deps/prune-1fe93b2c3120160d)

running 1 test
[*] creating engine at version 0.6.3
[*] tt: created VL table with 8 entries.
[*] Entering UCI mode
engine_info (0ms): info string entering uci mode
engine_info (1ms): info string resizing table...
engine_info (14ms): info string table resized to 1048576 entries in 0.013372005s
engine_info (25ms): info depth 1 seldepth 0 multipv 1 nodes 60 nps 90811 hashfull 0 tbhits 0 time 0 score cp 10 pv d2d4
engine_info (25ms): info depth 2 seldepth 1 multipv 1 nodes 888 nps 143497 hashfull 0 tbhits 0 time 6 score cp 25 pv g1f3 g8f6
engine_info (45ms): info depth 3 seldepth 4 multipv 1 nodes 3857 nps 129119 hashfull 0 tbhits 0 time 29 score cp 10 pv g1f3 g8f6 d2d4
engine_info (186ms): info depth 4 seldepth 4 multipv 1 nodes 22739 nps 136670 hashfull 0 tbhits 15 time 166 score cp 25 pv g1f3 g8f6 d2d4 d7d5
engine_info (882ms): info depth 5 seldepth 9 multipv 1 nodes 108663 nps 125828 hashfull 8 tbhits 2405 time 863 score cp 8 pv g1f3 g8f6 d2d4 d7d5 b1c3
engine_info (3446ms): info depth 6 seldepth 10 multipv 1 nodes 455256 nps 132948 hashfull 16 tbhits 5879 time 3424 score cp 25 pv g1f3 g8f6 d2d4 d7d5 b1c3 b8c6 c3d5
engine_info (20969ms): info depth 7 seldepth 14 multipv 1 nodes 2554082 nps 121902 hashfull 152 tbhits 56907 time 20951 score cp 6 pv g1f3 g8f6 e2e3 d7d5 f1d3 b8c6 e1g1
Best move: g1f3
 duration: 21130ms 
 max depth: 7
 total nodes searched: 3145545
killing child
test main ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 21.13s

***********************
 
prune on SOURCE branch:
-----------------------
�[1m�[32m   Compiling�[0m chesseng v0.6.3 (/home/runner/work/chesseng/chesseng)
�[1m�[32m    Finished�[0m `test` profile [unoptimized + debuginfo] target(s) in 0.32s
�[1m�[32m     Running�[0m tests/prune.rs (target/debug/deps/prune-1fe93b2c3120160d)

running 1 test
[*] creating engine at version 0.6.3
[*] tt: created VL table with 8 entries.
[*] Entering UCI mode
engine_info (0ms): info string entering uci mode
engine_info (1ms): info string resizing table...
engine_info (15ms): info string table resized to 1048576 entries in 0.014393939s
engine_info (26ms): info depth 1 seldepth 0 multipv 1 nodes 60 nps 90267 hashfull 0 tbhits 0 time 0 score cp 10 pv d2d4
engine_info (26ms): info depth 2 seldepth 1 multipv 1 nodes 888 nps 143354 hashfull 0 tbhits 0 time 6 score cp 25 pv g1f3 g8f6
engine_info (46ms): info depth 3 seldepth 4 multipv 1 nodes 3857 nps 133149 hashfull 0 tbhits 0 time 28 score cp 10 pv g1f3 g8f6 d2d4
engine_info (187ms): info depth 4 seldepth 4 multipv 1 nodes 22739 nps 137751 hashfull 0 tbhits 15 time 165 score cp 25 pv g1f3 g8f6 d2d4 d7d5
engine_info (853ms): info depth 5 seldepth 9 multipv 1 nodes 108663 nps 130752 hashfull 8 tbhits 2405 time 831 score cp 8 pv g1f3 g8f6 d2d4 d7d5 b1c3
engine_info (3385ms): info depth 6 seldepth 10 multipv 1 nodes 455256 nps 135410 hashfull 16 tbhits 5879 time 3362 score cp 25 pv g1f3 g8f6 d2d4 d7d5 b1c3 b8c6 c3d5
engine_info (19950ms): info depth 7 seldepth 14 multipv 1 nodes 2554082 nps 128145 hashfull 152 tbhits 56907 time 19931 score cp 6 pv g1f3 g8f6 e2e3 d7d5 f1d3 b8c6 e1g1
Best move: g1f3
 duration: 20111ms 
 max depth: 7
 total nodes searched: 3145545
killing child
test main ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 20.11s

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github-actions bot commented Aug 21, 2025

1m benchmark results:

1m on TARGET branch:
--------------------
�[1m�[32m    Finished�[0m `test` profile [unoptimized + debuginfo] target(s) in 0.07s
�[1m�[32m     Running�[0m tests/1m.rs (target/debug/deps/1m-6e6d4702253f18bd)

running 1 test
[*] creating engine at version 0.6.3
[*] tt: created VL table with 8 entries.
[*] Entering UCI mode
engine_info (0ms): info string entering uci mode
[*] uci: option use_tt set to on.
engine_info (14ms): info depth 1 seldepth 0 multipv 1 nodes 60 nps 93238 hashfull 0 tbhits 0 time 0 score cp 10 pv d2d4
engine_info (14ms): info depth 2 seldepth 1 multipv 1 nodes 898 nps 297722 hashfull 750 tbhits 0 time 3 score cp 25 pv g1f3 g8f6
engine_info (25ms): info depth 3 seldepth 4 multipv 1 nodes 4701 nps 312835 hashfull 1000 tbhits 0 time 15 score cp 10 pv g1f3 g8f6 d2d4
engine_info (93ms): info depth 4 seldepth 5 multipv 1 nodes 28249 nps 320552 hashfull 1000 tbhits 1 time 88 score cp 25 pv g1f3 d7d5 d2d4 g8f6
engine_info (510ms): info depth 5 seldepth 9 multipv 1 nodes 147029 nps 290758 hashfull 1000 tbhits 1 time 505 score cp 8 pv g1f3 d7d5 d2d4 g8f6 b1c3
engine_info (2977ms): info depth 6 seldepth 10 multipv 1 nodes 927231 nps 312149 hashfull 1000 tbhits 5 time 2970 score cp 25 pv g1f3 d7d5 d2d4 b8c6 b1c3 g8f6 c3d5
engine_info (20443ms): info depth 7 seldepth 13 multipv 1 nodes 5957583 nps 291562 hashfull 1000 tbhits 18 time 20433 score cp 6 pv g1f3 d7d5 e2e3 b8c6 f1d3 g8f6 e1g1
test main has been running for over 60 seconds
Best move: g1f3
 duration: 90004ms 
 max depth: 7
 total nodes searched: 7065751
killing child
test main ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 90.01s

********************
 
1m on SOURCE branch:
--------------------
�[1m�[32m   Compiling�[0m chesseng v0.6.3 (/home/runner/work/chesseng/chesseng)
�[1m�[32m    Finished�[0m `test` profile [unoptimized + debuginfo] target(s) in 1.93s
�[1m�[32m     Running�[0m tests/1m.rs (target/debug/deps/1m-6e6d4702253f18bd)

running 1 test
[*] creating engine at version 0.6.3
[*] tt: created VL table with 8 entries.
[*] Entering UCI mode
engine_info (0ms): info string entering uci mode
[*] uci: option use_tt set to on.
engine_info (14ms): info depth 1 seldepth 0 multipv 1 nodes 60 nps 85684 hashfull 0 tbhits 0 time 0 score cp 10 pv d2d4
engine_info (14ms): info depth 2 seldepth 1 multipv 1 nodes 898 nps 296436 hashfull 750 tbhits 0 time 3 score cp 25 pv g1f3 g8f6
engine_info (23ms): info depth 3 seldepth 4 multipv 1 nodes 4356 nps 315486 hashfull 1000 tbhits 0 time 13 score cp 10 pv g1f3 g8f6 d2d4
engine_info (94ms): info depth 4 seldepth 5 multipv 1 nodes 27397 nps 331126 hashfull 1000 tbhits 2 time 82 score cp 25 pv g1f3 d7d5 d2d4 g8f6
engine_info (499ms): info depth 5 seldepth 9 multipv 1 nodes 156271 nps 318817 hashfull 1000 tbhits 5 time 490 score cp 8 pv g1f3 d7d5 d2d4 g8f6 b1c3
engine_info (2881ms): info depth 6 seldepth 10 multipv 1 nodes 945416 nps 328331 hashfull 1000 tbhits 10 time 2879 score cp 25 pv g1f3 d7d5 d2d4 b8c6 b1c3 g8f6 c3d5
engine_info (19331ms): info depth 7 seldepth 13 multipv 1 nodes 5934763 nps 307155 hashfull 1000 tbhits 18 time 19321 score cp 6 pv g1f3 d7d5 e2e3 b8c6 f1d3 g8f6 e1g1
test main has been running for over 60 seconds
Best move: g1f3
 duration: 90005ms 
 max depth: 7
 total nodes searched: 7069161
killing child
test main ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 90.01s

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github-actions bot commented Aug 21, 2025

Search benchmark results:

search_bench/id_pos_0   time:   [76.021 µs 77.113 µs 78.236 µs]
                        change: [-9.1561% -1.8639% +3.8429%] (p = 0.67 > 0.05)
                        No change in performance detected.
Found 5 outliers among 100 measurements (5.00%)
  2 (2.00%) low mild
  3 (3.00%) high mild
search_bench/id_pos_1   time:   [63.494 µs 79.875 µs 97.667 µs]
                        change: [-33.993% -2.5313% +44.548%] (p = 0.90 > 0.05)
                        No change in performance detected.
Found 22 outliers among 100 measurements (22.00%)
  4 (4.00%) high mild
  18 (18.00%) high severe
search_bench/id_pos_2   time:   [58.611 µs 61.448 µs 64.455 µs]
                        change: [-40.605% -23.148% +1.2297%] (p = 0.09 > 0.05)
                        No change in performance detected.
Found 2 outliers among 100 measurements (2.00%)
  2 (2.00%) high mild
search_bench/id_pos_3   time:   [64.368 µs 82.035 µs 101.22 µs]
                        change: [-32.409% +10.481% +79.860%] (p = 0.74 > 0.05)
                        No change in performance detected.
Found 18 outliers among 100 measurements (18.00%)
  18 (18.00%) high severe

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github-actions bot commented Aug 21, 2025

Negamax benchmark results:

negamax_bench/ngm_full_depth_3
                        time:   [703.98 µs 704.87 µs 705.93 µs]
                        change: [-10.792% -10.554% -10.340%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 5 outliers among 100 measurements (5.00%)
  3 (3.00%) high mild
  2 (2.00%) high severe
negamax_bench/ngm_full_depth_4
                        time:   [431.75 µs 433.45 µs 435.65 µs]
                        change: [-4.7357% -4.1625% -3.6650%] (p = 0.00 < 0.05)
                        Change within noise threshold.
Found 11 outliers among 100 measurements (11.00%)
  4 (4.00%) high mild
  7 (7.00%) high severe
negamax_bench/ngm_full_depth_5
                        time:   [494.94 µs 495.58 µs 496.25 µs]
                        change: [-3.2616% -2.7626% -2.3313%] (p = 0.00 < 0.05)
                        Change within noise threshold.
Found 5 outliers among 100 measurements (5.00%)
  3 (3.00%) high mild
  2 (2.00%) high severe
negamax_bench/ngm_full_depth_6
                        time:   [407.42 µs 408.20 µs 409.38 µs]
                        change: [-5.6509% -5.3061% -4.9859%] (p = 0.00 < 0.05)
                        Change within noise threshold.
Found 5 outliers among 100 measurements (5.00%)
  3 (3.00%) high mild
  2 (2.00%) high severe

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github-actions bot commented Aug 21, 2025

Evaluation benchmark results:

eval_bench/eval_full    time:   [444.96 µs 445.43 µs 445.97 µs]
                        change: [-1.4363% -1.2547% -1.0248%] (p = 0.00 < 0.05)
                        Change within noise threshold.
Found 6 outliers among 100 measurements (6.00%)
  3 (3.00%) high mild
  3 (3.00%) high severe

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github-actions bot commented Aug 21, 2025

MoveGen benchmark results:

move_gen_bench/unordered
                        time:   [794.47 µs 796.48 µs 799.39 µs]
                        change: [+1.5697% +1.9063% +2.1946%] (p = 0.00 < 0.05)
                        Change within noise threshold.
Found 7 outliers among 100 measurements (7.00%)
  4 (4.00%) low mild
  3 (3.00%) high severe
move_gen_bench/ordered  time:   [894.31 µs 895.08 µs 896.05 µs]
                        change: [-0.2023% -0.0197% +0.1306%] (p = 0.83 > 0.05)
                        No change in performance detected.
Found 10 outliers among 100 measurements (10.00%)
  2 (2.00%) low mild
  4 (4.00%) high mild
  4 (4.00%) high severe

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@andtsa