Avoid allocations in Ability class.
Created by: huacnlee
It won't change anything after they are first invoke, so add method cache to avoid allocations and avoid GC.
Benchmarks:
Calculating -------------------------------------
project_guest_rules without method cache
79.352k i/100ms
project_guest_rules with method cache
93.634k i/100ms
-------------------------------------------------
project_guest_rules without method cache
2.865M (±32.5%) i/s - 11.982M
project_guest_rules with method cache
4.419M (± 7.4%) i/s - 22.004M
Comparison:
project_guest_rules with method cache: 4418908.0 i/s
project_guest_rules without method cache: 2864514.0 i/s - 1.54x slower
Calculating -------------------------------------
project_report_rules without method cache
53.126k i/100ms
project_report_rules with method cache
97.473k i/100ms
-------------------------------------------------
project_report_rules without method cache
1.093M (±36.5%) i/s - 4.675M
project_report_rules with method cache
4.420M (± 7.2%) i/s - 22.029M
Comparison:
project_report_rules with method cache: 4420054.3 i/s
project_report_rules without method cache: 1092509.6 i/s - 4.05x slower