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SHA256 performance with Guile 2.2 vs. Guile 3.0

From: Ludovic Courtès
Subject: SHA256 performance with Guile 2.2 vs. Guile 3.0
Date: Sat, 04 Jan 2020 00:55:47 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)

Hello Guilers!

Göran Weinholt wrote a pure-Scheme (R6RS) implementation of common
cryptographic hash functions:

I thought this would make a useful benchmark (and probably favorable to
JIT because it’s one hot loop), so here goes (computing the SHA256 hash
of ‘guile-2.2.6.tar.xz’ with the code below, compiled with -O2, Guile
2.2.6 vs. 2.9.8):

--8<---------------cut here---------------start------------->8---
ludo@ribbon ~/src/guix$ ./pre-inst-env guix environment --pure --ad-hoc guile 
guile-hashing -- guile ~/tmp/sha256.scm

;;; (hash "b33576331465a60b003573541bf3b1c205936a16c407bc69f8419a527bf5c988")
clock utime stime cutime cstime gctime
135.07 164.13  0.52   0.00   0.00  42.14
ludo@ribbon ~/src/guix$ ./pre-inst-env guix environment --pure --ad-hoc 
guile-next guile3.0-hashing -- guile ~/tmp/sha256.scm

;;; (hash "b33576331465a60b003573541bf3b1c205936a16c407bc69f8419a527bf5c988")
clock utime stime cutime cstime gctime
65.17 89.75  0.45   0.00   0.00  35.63
--8<---------------cut here---------------end--------------->8---

Guile 3 is twice as fast!  No difference if we force ‘-O3’.

Still far from the libgcrypt implementation in C + asm, but hey!

--8<---------------cut here---------------start------------->8---
ludo@ribbon ~/src/guix$ time guix hash -f hex 

real    0m0.097s
user    0m0.093s
sys     0m0.024s
--8<---------------cut here---------------end--------------->8---

To be continued…


(use-modules (hashing sha-2)
             (rnrs bytevectors)
             (ice-9 binary-ports)
             (ice-9 match)
             (ice-9 time))

(define (port-sha256 port)
  ;; Return the SHA256 of the data read from PORT.
  (define bv (make-bytevector 65536))
  (define hash (make-sha-256))

  (let loop ()
    (match (get-bytevector-n! port bv 0
                              (bytevector-length bv))
      ((? eof-object?)
       (sha-256-finish! hash)
       (sha-256-update! hash bv 0 n)

(define (file-sha256 file)
  ;; Return the SHA256 of FILE.
  (call-with-input-file file port-sha256))

(time (pk 'hash (sha-256->string (file-sha256 

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