Is the game length indicative of anything ?

[MahmoudUthman]

this is a representative of a typical game between my chess engine and Embla most of the time at (TC= 1 minute per engine)

[pgn][Event "Computer chess game"]
[Site "DESKTOP"]
[Date "2017.06.01"]
[Round "?"]
[White "Singularity"]
[Black "Embla 9.9"]
[Result "1-0"]
[BlackElo "2000"]
[ECO "C42"]
[Opening "Russian Game"]
[Time "03:03:50"]
[Variation "3.Nxe5"]
[WhiteElo "2200"]
[TimeControl "60"]
[Termination "normal"]
[PlyCount "53"]
[WhiteType "program"]
[BlackType "program"]

1. e4 {(e2-e4) +0.24/12 1} e5 {(e7-e5 Nb1-c3 Nb8-c6 Ng1-f3 Ng8-f6) -0.05/10
0} 2. Nf3 {(Ng1-f3) +0.15/14 1} Nf6 {(Ng8-f6 Nb1-c3 Nb8-c6 d2-d4 Bf8-b4
d4xe5 Nf6xe4 Qd1-d3 Ne4xc3 b2xc3) -0.05/10 1} 3. Nxe5 {(Nf3xe5) +0.35/13 0}
Qe7 {(Qd8-e7 d2-d4 d7-d6 Ne5-f3 Qe7xe4+ Bf1-e2 Bc8-f5 Qd1-d3 Nb8-c6 Nb1-c3
Qe4xd3 Be2xd3 Bf5xd3 c2xd3) -0.02/10 0} 4. Nf3 {(Ne5-f3) +0.46/13 1} Nxe4
{(Nf6xe4 Bf1-e2 Nb8-c6 O-O d7-d5 d2-d3 Ne4-c5 Rf1-e1 Bc8-e6) -0.02/9 0} 5.
Be2 {(Bf1-e2) +0.68/15 0} Nc6 {(Nb8-c6 O-O d7-d5 d2-d3 Ne4-c5 Rf1-e1 Bc8-e6
Nb1-c3 O-O-O) -0.10/9 0} 6. d3 {(d2-d3) +0.53/14 3} Nf6 {(Ne4-f6 O-O d7-d5
Rf1-e1 Bc8-e6 Nb1-c3 d5-d4 Nc3-b5 O-O-O) -0.09/9 0} 7. O-O {(O-O) +0.47/14
1} d5 {(d7-d5 Rf1-e1 h7-h6 Nb1-c3 Bc8-e6 Bc1-e3 O-O-O Nf3-d4 Nc6xd4 Be3xd4)
-0.16/10 1} 8. Nc3 {(Nb1-c3) +0.53/14 1} d4 {(d5-d4 Nc3-b5 Qe7-d7 Rf1-e1
a7-a6 Be2-f1+ Ke8-d8 Nb5-a3 Bf8-b4 Bc1-d2) -0.05/9 0} 9. Ne4 {(Nc3-e4)
+0.58/12 0} Be6 {(Bc8-e6 Ne4-g5 Be6-f5 Rf1-e1 O-O-O Be2-f1 Qe7-d7 Nf3-e5
Nc6xe5 Re1xe5) -0.05/10 1} 10. Nfg5 {(Nf3-g5) +0.56/11 1} Bf5 {(Be6-f5
Ne4-g3 Bf5-g6 Rf1-e1 Nc6-e5 Bc1-f4 Nf6-d5 Bf4-d2) -0.09/8 0} 11. Ng3
{(Ne4-g3) +0.93/12 0} Bg6 {(Bf5-g6 Rf1-e1 Qe7-b4 Ng5-e4 Nf6-d5 Be2-f3
Bf8-e7 a2-a3 Qb4-b6) -0.12/9 0} 12. Re1 {(Rf1-e1) +1.18/12 0} Qc5 {(Qe7-c5
h2-h4 h7-h6 Be2-f3+ Bf8-e7 Ng5-e4 Nf6xe4 Ng3xe4 Qc5-e5) -0.14/8 1} 13. h4
{(h2-h4) +1.06/11 0} h6 {(h7-h6 Be2-f3+ Bf8-e7 Ng5-e4 Nf6xe4 Ng3xe4 Qc5-e5
h4-h5 Bg6-f5 Bc1-d2) -0.17/9 1} 14. Bh5+ {(Be2-h5+) +1.08/14 0} Be7
{(Bf8-e7 Bh5xg6 h6xg5 h4xg5 f7xg6 g5xf6 g7xf6 Ng3-e4 Qc5-e5 Qd1-f3) -0.11/9
1} 15. Ne6 {(Ng5-e6) +1.35/16 0} Bxh5 {(Bg6xh5 Ne6xg7+ Ke8-d8 Ng7xh5 Nf6xh5
Qd1xh5 Qc5xh5 Ng3xh5 Be7xh4 Bc1-f4 Kd8-c8) -0.12/10 1} 16. Nxg7+ {(Ne6xg7+)
+1.31/16 0} Kd8 {(Ke8-d8 Ng7xh5 Nf6xh5 Qd1xh5 Qc5xh5 Ng3xh5 Be7xh4 Ra1-b1
Bh4-g5 Nh5-g7 Kd8-c8) -0.07/10 0} 17. N7xh5 {(Ng7xh5) +1.25/16 0} Nxh5
{(Nf6xh5 Qd1xh5 Qc5xh5 Ng3xh5 Be7xh4 c2-c3 d4xc3 b2xc3 Bh4-g5 Bc1-f4 Rh8-g8
Ra1-b1) -0.10/12 1} 18. Nxh5 {(Ng3xh5) +1.39/15 1} Bxh4 {(Be7xh4 Qd1-g4
Bh4-g5 Bc1xg5+ Qc5xg5 Qg4-f3 f7-f5 Qf3-d5+ Kd8-c8 Qd5-e6+ Kc8-b8 Nh5-f6)
-0.15/9 1} 19. Qf3 {(Qd1-f3) +1.84/11 0} Qxc2 {(Qc5xc2 Qf3xf7 Kd8-c8 g2-g3
Bh4-e7 Nh5-f4 Be7-d6 Qf7-b3) -0.15/8 1} 20. Bf4 {(Bc1-f4) +2.92/11 0} Be7
{(Qc2xb2) +0.81/7 0} 21. Rac1 {(Ra1-c1) +4.78/13 0} Qxb2 {(Qc2xb2 Qf3-d5+
Be7-d6 Bf4xd6 c7xd6 Qd5xd6+ Kd8-c8 Qd6-f6 Rh8-g8 Qf6xf7 Rg8-g5) -0.12/9 1}
22. Rxc6 {(Rc1xc6) +9.14/14 0} bxc6 {(b7xc6 Qf3xc6 Ra8-c8 Qc6-d5+ Kd8-e8
Qd5-e5 Ke8-d7 Qe5xe7+ Kd7-c6 Qe7-f6+ Kc6-b7 Qf6xf7) -1.64/9 0} 23. Qxc6
{(Qf3xc6) +12.22/13 0} Rc8 {(Ra8-c8) -2.39/8 1} 24. Nf6 {(Nh5-f6) +M4/5 0}
Qb5 {(Qb2-b5 Qc6xb5 c7-c6 Qb5-a5+ Rc8-c7 Qa5xc7+) -99.95/7 0} 25. Qxb5
{(Qc6xb5) +M3/2} c6 {(c7-c6 Qb5-a5+ Rc8-c7 Qa5xc7+) -99.97/6 0} 26. Qa5+
{(Qb5-a5+) +M2/1} Rc7 27. Qxc7# {(Qa5xc7+) +M1/1} 1-0[/pgn]

and this is the same for (TC= 4 seconds for my engine and 1 minute for Embla)
[pgn]
[Event "Computer chess game"]
[Site "DESKTOP"]
[Date "2017.06.01"]
[Round "?"]
[White "Singularity"]
[Black "Embla 9.9"]
[Result "1-0"]
[BlackElo "2000"]
[ECO "A00"]
[Opening "Dunst (Sleipner-Heinrichsen-Van Geet) Opening"]
[Time "23:40:05"]
[Variation "1...d5 2.Nf3"]
[WhiteElo "2200"]
[TimeControl "60"]
[Termination "normal"]
[PlyCount "37"]
[WhiteType "program"]
[BlackType "program"]

1. Nc3 {(Nb1-c3) +0.05/8 0} d5 {(d7-d5 d2-d4 Ng8-f6 Ng1-f3 Nb8-c6 e2-e3
e7-e6 Bf1-d3 Bf8-d6 Nc3-b5 Bd6-e7) -0.01/11 0} 2. Nf3 {(Ng1-f3) -0.02/8 0}
d4 {(d5-d4 Nc3-e4 e7-e5 e2-e3 Nb8-c6 e3xd4 e5xd4 Bf1-d3 Ng8-f6 Ne4xf6+
Qd8xf6 O-O) +0.01/11 0} 3. Nb5 {(Nc3-b5) +0.16/9 0} Nc6 {(Nb8-c6 e2-e3
e7-e5 e3xd4 e5xd4 c2-c3 d4xc3 d2xc3 Ng8-f6 Qd1xd8+ Ke8xd8 Bf1-d3) +0.01/11
0} 4. e3 {(e2-e3) +0.48/9 0} e5 {(e7-e5 e3xd4 e5xd4 c2-c3 d4xc3 d2xc3
Ng8-f6 Bf1-d3 Bc8-e6 Nb5-d4 Be6-d5) +0.02/11 1} 5. exd4 {(e3xd4) +0.54/9 0}
exd4 {(e5xd4 c2-c3 d4xc3 d2xc3 a7-a6 Qd1xd8+ Ke8xd8 Nb5-d4 Nc6xd4 c3xd4
Ng8-f6) -0.02/10 1} 6. Bc4 {(Bf1-c4) +0.33/8 0} a6 {(a7-a6 Nb5-a3 b7-b5
Qd1-e2+ Qd8-e7 Bc4-d5 Qe7xe2+ Ke1xe2 Ng8-e7 Bd5-b3) +0.12/8 0} 7. Nc3
{(Nb5-c3) -0.35/7 0} dxc3 {(d4xc3 d2xc3 Qd8xd1+ Ke1xd1 Bc8-f5 Rh1-e1+
Ng8-e7 Nf3-d4 O-O-O Bc4xf7 Nc6xd4 c3xd4 Rd8xd4+ Bc1-d2) +2.25/8 0} 8. O-O
{(O-O) -1.80/8 0} cxd2 {(c3xd2 Bc1xd2 Ng8-e7 Rf1-e1 Bc8-f5) +3.02/9 1} 9.
Bxd2 {(Bc1xd2) -1.14/8 0} Nge7 {(Ng8-e7 Rf1-e1 Bc8-f5 Qd1-c1 Qd8-d6 Bd2-f4
Qd6-c5 Bc4-b3 Ra8-c8) +3.02/9 0} 10. Re1 {(Rf1-e1) -1.05/8 0} Bf5 {(Bc8-f5
Bc4-b3 Qd8-d6 Nf3-g5 Bf5-g6 Ng5-e4 Qd6-d4 Bd2-c3 Qd4-b6) +2.98/9 0} 11. Ng5
{(Nf3-g5) +0.39/8 0} Bg6 {(Bf5-g6 Bd2-c3 Qd8xd1 Ra1xd1 Ra8-d8 Rd1xd8+
Nc6xd8 Ng5-e4 Nd8-e6 Bc4-b3) +2.97/9 1} 12. Qf3 {(Qd1-f3) +0.12/8 0} f5
{(f7-f5 Ra1-d1 Qd8-b8 Bd2-c3 Nc6-d8 Re1xe7+ Bf8xe7 Bc3xg7 b7-b5 Bg7xh8
b5xc4) +2.17/9 1} 13. Bc3 {(Bd2-c3) +1.98/8 0} Qb8 {(Qd8-b8 Ng5-e6 Bg6-f7
Bc3xg7 Rh8-g8 Bg7xf8 Bf7xe6 Bc4xe6 Rg8xf8) +1.94/8 0} 14. Rad1 {(Ra1-d1)
+3.77/8 0} Nd8 {(Nc6-d8 Re1xe7+ Bf8xe7 Bc3xg7 Nd8-c6 Bg7xh8 Be7xg5 Bh8-c3)
+1.95/8 1} 15. Qe2 {(Qf3-e2) +4.85/9 0} b5 {(b7-b5 Bc3xg7 b5xc4 Bg7xh8
h7-h6 Ng5-f3) +0.32/7 0} 16. Be6 {(Bc4-e6) +M4/9 0} Qc8 {(Qb8-c8 Be6xc8
Ra8xc8 Qe2-d3 Rh8-g8 Qd3-d7+) -99.94/7 0} 17. Bxc8 {(Be6xc8) +M3/5 0} Rxc8
{(Ra8xc8 Qe2-d3 Rh8-g8 Qd3-d7+) -99.96/6 0} 18. Qd2 {(Qe2-d2) +M2/2} Nc6
{(Nd8-c6 Qd2-d7+) -99.98/3 0} 19. Qd7# {(Qd2-d7+) +M1/1} 1-0
[/pgn]

most of the time -"maybe always"- when I given my engine less time it wins faster "only noticed this playing against Embla", is this normal or could this mean the existence of a bug that manifest more at higher time controls ?

[kbhearn]

In your 'faster' game your engine actually lost a piece and got into a worse position before embla defended poorly and got itself mated. It's plausible your engine when it sees less plays more 'coffee-house' style chess and thus against an engine as weak as embla produces quicker wins (a similar effect is visible against humans where weaker engine personalities can crush human players more dramatically than strictly speaking stronger personalities).