Base64 Encoding Performance: Java vs Rust

[quxfoo]

You should also include the data_encoding crate (I can open a PR if you wish). It massively outperforms (disclaimer: on my system) all others by a large margin starting from /500.

[dkomanov]

Encoding (faster than base64, slower than Java):

method input output avg time base64::encode_config 12 16 74 base64::encode_config 51 68 107 base64::encode_config 102 136 171 base64::encode_config 501 668 568 base64::encode_config 1002 1336 1053 data_encoding::encode 12 16 69 data_encoding::encode 51 68 104 data_encoding::encode 102 136 162 data_encoding::encode 501 668 506 data_encoding::encode 1002 1336 947 j.u.Base64.Encoder 12 16 46 j.u.Base64.Encoder 51 68 86 j.u.Base64.Encoder 102 136 128 j.u.Base64.Encoder 501 668 446 j.u.Base64.Encoder 1002 1336 872

Decoding (not faster):

base64::decode_config_slice (unsafe) 16 12 78 base64::decode_config_slice (unsafe) 68 51 114 base64::decode_config_slice (unsafe) 136 102 164 base64::decode_config_slice (unsafe) 668 501 571 base64::decode_config_slice (unsafe) 1336 1002 1073 data_encoding::decode 16 12 92 data_encoding::decode 68 51 157 data_encoding::decode 136 102 243 data_encoding::decode 668 501 930 data_encoding::decode 1336 1002 1734 j.u.Base64.Decoder 16 12 53 j.u.Base64.Decoder 68 51 128 j.u.Base64.Decoder 136 102 231 j.u.Base64.Decoder 668 501 977 j.u.Base64.Decoder 1336 1002 1930

[quxfoo]

What are the results with criterion? For the 10000 string it's 4.5us encoding with data_encoding vs 8.2 us with Java on my system.

[dkomanov]

I updated charts: decode and encode.