GannettDigital / jstransform / 102

79%

master: 34%

Pull #32

travis-ci

Rework transformer so that it walks the schema only on initialization

The initialization builds up a tree of transformIdentifiers which are
used to drive the transformation step. This makes the code easier to
follow, allows for better unit testing, enables concurrently
transforming multiple input files and is faster.

Performance improvement since the last release:
name                                                                                         old time/op    new time/op    delta
Transformer/Use_basic_transforms,_copy_from_input_and_default_to_build_result-8                 164µs ± 5%      71µs ± 2%  -56.58%  (p=0.000 n=10+10)
Transformer/Array_transforms,_tests_arrays_with_string_type_and_with_a_single_object_type-8     267µs ± 7%      61µs ± 6%  -77.13%  (p=0.000 n=9+10)
Transformer/Test_all_operations-8                                                               200µs ± 6%      57µs ± 1%  -71.72%  (p=0.000 n=10+10)
Transformer/Test_empty_non-required_object-8                                                    164µs ± 1%      70µs ± 0%  -57.38%  (p=0.000 n=9+10)
Transformer/Test_empty_non-required_array-8                                                     149µs ± 2%      35µs ± 4%  -76.28%  (p=0.000 n=10+10)
Transformer/Test_nested_arrays-8                                                                373µs ± 2%      86µs ± 3%  -76.90%  (p=0.000 n=10+10)
Transformer/Test_format:_date-time_strings-8                                                   63.7µs ± 2%    26.1µs ± 1%  -59.08%  (p=0.000 n=10+8)

name                                                                                         old alloc/op   new alloc/op   delta
Transformer/Use_basic_transforms,_copy_from_input_and_default_to_build_result-8                57.8kB ± 0%    41.9kB ± 0%  -27.48%  (p=0.000 n=10+9)
Transformer/Array_transforms,_tests_arrays_with_string_type_and_with_a_single_object_type-8    77.3kB ± 0%    36.8kB ± 0%  -52.40%  (p=0.000 n=10+10)
Transformer... (continued)

311 of 311 new or added lines in 4 files covered. (100.0%)

1080 of 1366 relevant lines covered (79.06%)

24.86 hits per line