concat vs. +(operation) vs. StringBuilder

AB-12345678-CD

// delete hyphen and concatenate with strings

AB12345678CD

32bit environment

• testConcat -> ---- nanoTime

• testPlus -> ---- nanoTime

• testStringBuilder -> ---- nanoTime

⇒ StringBuilder is the best way concatenate with strings

64bit environment

• time to StringBuilder = 42973 nanoTime

• time to Concat = 12985 nanoTime

• time to Plus = 24423 nanoTime

⇒ Concat API is the best way