serialization - 如何快速将 Clojure 数据结构序列化为带有缩进的字符串？

Question

clojure.pprint 似乎做我想做的事：

user=> (def a {"q" {:q 1 :w 2 :e 3 :r 4 :t 4}, "w" {:q 1 :w 2 :e 3 :r 4 :t 4} "e" {:q 1 :w 2 :e 3 :r 4 :t 4}, "r" {:q 1 :w 2 :e 3 :r 4 :t 4}})
user=> (pprint a)
{"e" {:r 4, :e 3, :w 2, :t 4, :q 1},
 "q" {:r 4, :e 3, :w 2, :t 4, :q 1},
 "r" {:r 4, :e 3, :w 2, :t 4, :q 1},
 "w" {:r 4, :e 3, :w 2, :t 4, :q 1}}
nil

但

user=> (time (with-out-str (pprint a)))
"Elapsed time: 174.621945 msecs"
...
user=> (time (do (with-out-str (pprint (repeat 1000 {:r 4 :t 6 :q 3 :u 5 :d 3}))) nil))
"Elapsed time: 32902.028436 msecs"

它太慢了。

Clojure 中是否有任何打印机可以进行缩进（可能不如 pprint 准确），但速度也很快并且适用于大型结构？

Answer 1

您可能想查看 Brandon Bloom 的Fipp（GitHub 存储库摘要：“Fast Idiomatic Pretty Printer for Clojure”）。请注意，README 声明它现在是edn -only。