Refactor: get object value by key name improve performance

[b41sh]

1. Refactor the implementation of get object value by the key name, avoid reading all the key jentries at one time, change to a lazy mode, only read when need, avoid the performance impact of reading a lot of keys.
2. Check whether the length of the object's key is equal to the needed key name first, to reduce the call of equal function.
3. Avoid using Deserializer to convert the type of data inside the function, because usually we already know the type, we can extract it directly to avoid extra judgement in the conversion process of Deserializer.

[Xuanwo]

Hi, how about we add a bench first?

[b41sh]

Hi, how about we add a bench first?

@Xuanwo Thanks for your advice. By running the get_path benchmark, we can see a performance improvement of about 50 percent, and the tests at Databend have achieved similar results.

the main branch

     Running benches/get_path.rs (target/release/deps/get_path-02e1adcdc0056503)
Gnuplot not found, using plotters backend
jsonb get canada->type  time:   [105.38 ns 107.12 ns 109.33 ns]
Found 13 outliers among 100 measurements (13.00%)
  3 (3.00%) high mild
  10 (10.00%) high severe

jsonb get citm_catalog->areaNames->205705994
                        time:   [159.96 ns 161.45 ns 163.17 ns]
Found 6 outliers among 100 measurements (6.00%)
  2 (2.00%) high mild
  4 (4.00%) high severe

jsonb get citm_catalog->topicNames->324846100
                        time:   [190.09 ns 193.88 ns 198.33 ns]
Found 18 outliers among 100 measurements (18.00%)
  9 (9.00%) high mild
  9 (9.00%) high severe

jsonb get twitter->search_metadata->max_id_str
                        time:   [154.26 ns 160.10 ns 166.94 ns]
Found 10 outliers among 100 measurements (10.00%)
  2 (2.00%) high mild
  8 (8.00%) high severe

this PR

     Running benches/get_path.rs (target/release/deps/get_path-02e1adcdc0056503)
Gnuplot not found, using plotters backend
jsonb get canada->type  time:   [58.256 ns 59.683 ns 61.254 ns]
                        change: [-46.353% -45.295% -44.208%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 16 outliers among 100 measurements (16.00%)
  3 (3.00%) high mild
  13 (13.00%) high severe

jsonb get citm_catalog->areaNames->205705994
                        time:   [78.413 ns 80.497 ns 83.411 ns]
                        change: [-51.182% -50.129% -48.901%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 11 outliers among 100 measurements (11.00%)
  5 (5.00%) high mild
  6 (6.00%) high severe

jsonb get citm_catalog->topicNames->324846100
                        time:   [82.818 ns 84.680 ns 87.161 ns]
                        change: [-57.390% -56.545% -55.668%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 17 outliers among 100 measurements (17.00%)
  4 (4.00%) high mild
  13 (13.00%) high severe

jsonb get twitter->search_metadata->max_id_str
                        time:   [70.169 ns 71.039 ns 72.024 ns]
                        change: [-55.906% -54.712% -53.614%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 14 outliers among 100 measurements (14.00%)
  5 (5.00%) high mild
  9 (9.00%) high severe