Clojure devs recommend writing with spit. Which is really inefficient.

spit_vs_with-open

```
carbon-relaj.core=> (time 
               #_=>  (doseq [c (range 10000)]
               #_=>         (spit "/tmp/spit-file" (str c "\n"))))
"Elapsed time: 8613.006 msecs"
nil
carbon-relaj.core=> 

carbon-relaj.core=> (time 
               #_=>  (let [fname "/tmp/with-open"]
               #_=>    (with-open [wr-file (clojure.java.io/writer fname)]
               #_=>               (doseq [c (range 10000)] 
               #_=>                      (.write wr-file (str c "\n"))))))
"Elapsed time: 4.991 msecs"
nil
```
There's no real surprise here, it just confirms that there's no secret sauce to 
make writing to the file fast as long as the context of the write is to the same file :(