Preparations for version 3.2

[ChristopherRabotin]

• Add Eq to all enums and Ord where relevant v3.1 -- usability enhancement #118
• Use const fn where possible and switch to references where possible [WIP] Const fn where possible #119
• Allow extracting the centuries and nanoseconds of a Duration and Epoch, respectively with to_parts and to_tai_parts Allow extracting the centuries and nanoseconds from a Duration #122

Signed-off-by: Christopher Rabotin christopher.rabotin@gmail.com

[ChristopherRabotin]

Woohoo! As expected, switching to references for most of the functions speeds up a lot of the computations.

TBD seconds and JDE ET  time:   [321.70 ns 322.89 ns 324.26 ns]                                   
                        change: [-8.8590% -7.2196% -5.6649%] (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

TT                      time:   [173.09 ns 173.51 ns 174.03 ns]               
                        change: [-11.385% -10.111% -8.8828%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 9 outliers among 100 measurements (9.00%)
  3 (3.00%) high mild
  6 (6.00%) high severe

Duration to f64 seconds time:   [5.9346 ns 5.9533 ns 5.9728 ns]                                     
                        change: [-4.4192% -3.8994% -3.4180%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
  2 (2.00%) high mild

Duration add and assert day hour                                                                             
                        time:   [15.312 ns 15.351 ns 15.395 ns]
                        change: [-19.037% -18.363% -17.659%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  3 (3.00%) high mild
  1 (1.00%) high severe

Duration add and assert minute second                                                                             
                        time:   [15.971 ns 16.016 ns 16.064 ns]
                        change: [-7.7564% -6.6109% -5.6376%] (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

Duration add and assert subseconds                                                                             
                        time:   [13.446 ns 13.620 ns 13.817 ns]
                        change: [-10.425% -9.4778% -8.4855%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 3 outliers among 100 measurements (3.00%)
  2 (2.00%) high mild
  1 (1.00%) high severe