At Fri, 22 Feb 2019 16:34:24 -0500, Jon Zeppieri wrote:
> On a related (but not too related) note: is there an efficient way to skip
> multiple bytes in an input stream? It looks like there are two choices:
> - You can read the bytes you want to skip, but that implies either
> allocating a useles
I added some type annotations & tried it. The result is 16s, substantially
slower.
Haven't tried tjson, yet. I'm not actually even that interested in json, it
was just something at-hand to try.
>From this thread, it sounds like there's some knowledge about racket
performance that isn't yet in
I have tried my best to find the "best practice" to do Racket IO.
Here are some tips I found in writing CSV reader:
https://github.com/wargrey/schema/blob/master/digitama/exchange/csv/reader/port.rkt
With a MacBook Pro 15, 2013, it takes 3.5s to read a 70MB file.
I agreed that `read-char` is the
On a related (but not too related) note: is there an efficient way to skip
multiple bytes in an input stream? It looks like there are two choices:
- You can read the bytes you want to skip, but that implies either
allocating a useless byte array or keeping one around for this very purpose.
- Yo
I think the bigger bottleneck is the main parsing loop, which uses
`regexp-try-match` even more. Although `regexp-try-match` is
convenient, it's much slower than using `peek-char` directly to check
for one character. I'll experiment with improvements there.
At 22 Feb 2019 13:36:20 -0500, "'John Cl
There is http://docs.racket-lang.org/tjson/index.html available (haven't
checked how similar the code is though)
On Friday, February 22, 2019 at 7:36:23 PM UTC+1, johnbclements wrote:
>
>
>
> … and my guess is that the JS performance would be similar, if the json
> reader in JS was written in J
I’m not that surprised :).
My guess is that our json reader could be sped up quite a bit. This looks like
the heart of the read-json implementation:
(define (read-json* who i jsnull)
;; Follows the specification (eg, at json.org) -- no extensions.
;;
(define (err fmt . args)
(define-va
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