ripgrep-build-defaults.txt

ripgrep master
cargo check -j12, 5 warmup runs, 15 timed runs

1) baseline, the current defaults
Time (mean ± σ):     16.249 s ±  0.104 s    [User: 54.759 s, System: 4.811 s]
Range (min … max):   16.071 s … 16.408 s    15 runs

2) debuginfo = 1: -5.4%
Time (mean ± σ):     15.364 s ±  0.110 s    [User: 50.724 s, System: 4.711 s]
Range (min … max):   15.172 s … 15.573 s    15 runs

3) debuginfo = off: -7.5%
Time (mean ± σ):     15.028 s ±  0.257 s    [User: 47.795 s, System: 4.535 s]
Range (min … max):   14.646 s … 15.455 s    15 runs

4) debuginfo = off, strip = debuginfo: -7.7%
Time (mean ± σ):     14.998 s ±  0.165 s    [User: 47.637 s, System: 4.531 s]
Range (min … max):   14.736 s … 15.295 s    15 runs

5) debuginfo = off, strip = symbols: -8.9%
Time (mean ± σ):     14.805 s ±  0.121 s    [User: 47.205 s, System: 4.445 s]
Range (min … max):   14.527 s … 15.001 s    15 runs

6) debuginfo = off, strip = symbols, incremental = false: -9% 
Time (mean ± σ):     14.786 s ±  0.110 s    [User: 47.324 s, System: 4.364 s]
Range (min … max):   14.623 s … 14.987 s    15 runs

7) debuginfo = off, strip = symbols, incremental = false, lld: -11.9%
Time (mean ± σ):     14.306 s ±  0.087 s    [User: 45.856 s, System: 5.613 s]
Range (min … max):   14.172 s … 14.491 s    15 runs

ripgrep-build-defaults2.txt

ripgrep master
cargo build -j12, 5 warmup runs, 15 timed runs

1) baseline, the current defaults
Time (mean ± σ):     22.635 s ±  0.258 s    [User: 97.180 s, System: 7.392 s]
Range (min … max):   22.044 s … 23.130 s    15 runs

2) debuginfo = 1: -0.9%
Time (mean ± σ):     22.425 s ±  0.314 s    [User: 104.065 s, System: 7.717 s]
Range (min … max):   21.890 s … 22.962 s    15 runs

3) debuginfo = off: -3.7%
Time (mean ± σ):     21.802 s ±  0.423 s    [User: 100.643 s, System: 7.517 s]
Range (min … max):   20.960 s … 22.530 s    15 runs

4) debuginfo = off, strip = debuginfo: -3.83%
Time (mean ± σ):     21.766 s ±  0.435 s    [User: 101.050 s, System: 7.650 s]
Range (min … max):   20.909 s … 22.398 s    15 runs

5) debuginfo = off, strip = symbols: -3.83%
Time (mean ± σ):     21.766 s ±  0.435 s    [User: 101.050 s, System: 7.650 s]
Range (min … max):   20.909 s … 22.398 s    15 runs

6) debuginfo = off, strip = symbols, incremental = false: -4.63%
Time (mean ± σ):     21.586 s ±  0.467 s    [User: 100.516 s, System: 7.419 s]
Range (min … max):   20.711 s … 22.655 s    15 runs

7) debuginfo = off, strip = symbols, incremental = false, lld: -14%
Time (mean ± σ):     19.461 s ±  0.410 s    [User: 98.533 s, System: 10.514 s]
Range (min … max):   18.803 s … 20.071 s    15 runs

snafu-build-defaults.txt

snafu-0.7.0
cargo check -j12, 5 warmup runs, 50 timed runs

1) baseline, the current defaults
Time (mean ± σ):      9.594 s ±  0.119 s    [User: 21.078 s, System: 1.603 s]
Range (min … max):    9.406 s …  9.888 s    50 runs

2) debuginfo = 1: -12.5%
Time (mean ± σ):      8.389 s ±  0.078 s    [User: 18.316 s, System: 1.426 s]
Range (min … max):    8.222 s …  8.575 s    50 runs

3) debuginfo = off: -18.7%
Time (mean ± σ):      7.797 s ±  0.061 s    [User: 16.205 s, System: 1.294 s]
Range (min … max):    7.675 s …  7.938 s    50 runs

4) debuginfo = off, strip = debuginfo: -18.9%
Time (mean ± σ):      7.781 s ±  0.061 s    [User: 16.180 s, System: 1.279 s]
Range (min … max):    7.657 s …  7.945 s    50 runs

5) debuginfo = off, strip = symbols: -18.9% but slightly better.
Time (mean ± σ):      7.777 s ±  0.074 s    [User: 16.151 s, System: 1.286 s]
Range (min … max):    7.649 s …  7.963 s    50 runs

6) debuginfo = off, strip = symbols, incremental = false: -18.9%; within noise as it's often not applicable in benchmarks
Time (mean ± σ):      7.779 s ±  0.063 s    [User: 16.126 s, System: 1.288 s]
Range (min … max):    7.631 s …  7.905 s    50 runs

7) debuginfo = off, strip = symbols, incremental = false, lld: -24.5%
Time (mean ± σ):      7.241 s ±  0.073 s    [User: 15.659 s, System: 1.643 s]
Range (min … max):    7.102 s …  7.448 s    50 runs

syn-build-defaults.txt

syn-1.0.86
cargo check -j12, 5 warmup runs, 50 timed runs

1) baseline, the current defaults
Time (mean ± σ):      3.188 s ±  0.038 s    [User: 3.932 s, System: 0.506 s]
Range (min … max):    3.112 s …  3.322 s    50 runs

2) debuginfo = 1: -1.2%
Time (mean ± σ):      3.149 s ±  0.039 s    [User: 3.777 s, System: 0.494 s]
Range (min … max):    3.049 s …  3.243 s    50 runs

3) debuginfo = off: -1.8%
Time (mean ± σ):      3.130 s ±  0.040 s    [User: 3.644 s, System: 0.487 s]
Range (min … max):    3.049 s …  3.201 s    50 runs

4) debuginfo = off, strip = debuginfo: -1.75%
Time (mean ± σ):      3.132 s ±  0.039 s    [User: 3.641 s, System: 0.489 s]
Range (min … max):    3.023 s …  3.211 s    50 runs

5) debuginfo = off, strip = symbols: -1.72%
Time (mean ± σ):      3.133 s ±  0.043 s    [User: 3.649 s, System: 0.488 s]
Range (min … max):    3.048 s …  3.217 s    50 runs

6) debuginfo = off, strip = symbols, incremental = false: -2%
Time (mean ± σ):      3.124 s ±  0.043 s    [User: 3.489 s, System: 0.458 s]
Range (min … max):    3.006 s …  3.202 s    50 runs

7) debuginfo = off, strip = symbols, incremental = false, lld: -4.3%
Time (mean ± σ):      3.051 s ±  0.038 s    [User: 3.377 s, System: 0.630 s]
Range (min … max):    2.975 s …  3.117 s    50 runs