JarCastingsprint
Fluent, small and fast String formatter for Java.
Synopsis
final Sprint sprint = new Sprint();
System.out.Println(sprint.ff("Hello: {}!", "John")); // => Hello: John!
Description
sprint is a formatter for String.
This library provides a formating method ff, this method formats String according to fluent (or loose?) template like "{}:{}". {} is a placeholder to fill any arguments. This method takes arguments after template and fill those into placeholder.
This method parses template only at once. Parsed structure is stored on ConcurrentHashMap which is contained in instance of Sprint. When it formats String with the same template, it uses pre-parsed structures from the second time.
Benchmark
Benchmark project is here. This is a result of jdk1.8.0_92.
n=10000
Score:
sprintff: 0 wallclock secs ( 0.01 usr + 0.00 sys = 0.01 CPU) @ 798977.31/s (n=10000)
stringFormat: 0 wallclock secs ( 0.11 usr + 0.01 sys = 0.13 CPU) @ 77924.71/s (n=10000)
Comparison chart:
Rate sprintff stringFormat
sprintff 798977/s -- 925%
stringFormat 77925/s -90% --
n=100000
Score:
sprintff: 0 wallclock secs ( 0.06 usr + 0.03 sys = 0.09 CPU) @ 1143850.66/s (n=100000)
stringFormat: 0 wallclock secs ( 0.50 usr + 0.00 sys = 0.51 CPU) @ 197784.81/s (n=100000)
Comparison chart:
Rate sprintff stringFormat
sprintff 1143851/s -- 478%
stringFormat 197785/s -83% --
Hints
This class should be used as singleton because cache of parsed result of template is stored on instance field
TODO
sprintfcompatible template
Author
moznion ([email protected])
License
The MIT License (MIT)
Copyright © 2016 moznion, http://moznion.net/ <[email protected]>
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