performance degradation between 0.13 and 0.14

[rkuhn]

ipfs-rust/unixfsv1@6453d9b introduced a ca. 10% slowdown in the unixfs-v1 benchmarks (I first ran the new, then the old):

adder/175               time:   [51.599 us 51.613 us 51.630 us]                     
                        thrpt:  [3.2325 MiB/s 3.2335 MiB/s 3.2344 MiB/s]
                 change:
                        time:   [-0.2399% -0.1194% -0.0202%] (p = 0.03 < 0.05)
                        thrpt:  [+0.0202% +0.1195% +0.2405%]
                        Change within noise threshold.
Found 3 outliers among 30 measurements (10.00%)
  2 (6.67%) high mild
  1 (3.33%) high severe
adder/30277             time:   [9.2331 ms 9.2395 ms 9.2469 ms]                       
                        thrpt:  [3.1226 MiB/s 3.1251 MiB/s 3.1273 MiB/s]
                 change:
                        time:   [-7.2410% -7.1500% -7.0590%] (p = 0.00 < 0.05)
                        thrpt:  [+7.5951% +7.7006% +7.8063%]
                        Performance has improved.
Found 1 outliers among 30 measurements (3.33%)
  1 (3.33%) high mild
adder/60553             time:   [22.040 ms 22.051 ms 22.061 ms]                       
                        thrpt:  [2.6176 MiB/s 2.6189 MiB/s 2.6201 MiB/s]
                 change:
                        time:   [-9.5500% -9.4965% -9.4400%] (p = 0.00 < 0.05)
                        thrpt:  [+10.424% +10.493% +10.558%]
                        Performance has improved.

Haven’t looked further yet (need to finish a larger upgrade first).