Avoid redundant `attribute_alias?` before `attribute_alias`
If we want to get alias resolved attribute finally, we can use `attribute_alias` directly. For that purpose, avoiding redundant `attribute_alias?` makes alias attribute access 40% faster. https://gist.github.com/kamipo/e427f080a27b46f50bc508fae3612a0e Before (2c0729d8): ``` Warming up -------------------------------------- user['id'] 102.668k i/100ms user['new_id'] 80.660k i/100ms user['name'] 99.368k i/100ms user['new_name'] 81.626k i/100ms Calculating ------------------------------------- user['id'] 1.431M (± 4.0%) i/s - 7.187M in 5.031985s user['new_id'] 1.042M (± 4.2%) i/s - 5.243M in 5.039858s user['name'] 1.406M (± 5.6%) i/s - 7.055M in 5.036743s user['new_name'] 1.074M (± 3.6%) i/s - 5.387M in 5.024152s ``` After (this change): ``` Warming up -------------------------------------- user['id'] 109.775k i/100ms user['new_id'] 103.303k i/100ms user['name'] 105.988k i/100ms user['new_name'] 99.618k i/100ms Calculating ------------------------------------- user['id'] 1.520M (± 6.7%) i/s - 7.574M in 5.011496s user['new_id'] 1.485M (± 6.2%) i/s - 7.438M in 5.036252s user['name'] 1.538M (± 5.4%) i/s - 7.737M in 5.049765s user['new_name'] 1.516M (± 4.6%) i/s - 7.571M in 5.007293s ```
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