[Bug 1998648] [NEW] Cat hash.sha256 | rhash -c - is 120x slower

[Charles Evans]

Public bug reported:

Time rhash -c hash.sha256
3s
Time Cat hash.sha256 | rhash -c - 
5m55s
CPU is pegged at 100% the whole time
Use case:
grep iso hash.sha256 | rhash -c -
Also fails: 
Time rhash -c <(  grep iso hash.sha256 )
5m55s
Sha256sum works, identical 17s times for all 4

Ubuntu studio jammy LTS
rhash 1.4.2-1ubuntu1
rhash -V
RHash v1.4.2

** Affects: rhash (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1998648

Title:
  Cat hash.sha256 | rhash -c - is 120x slower

Status in rhash package in Ubuntu:
  New

Bug description:
  Time rhash -c hash.sha256
  3s
  Time Cat hash.sha256 | rhash -c - 
  5m55s
  CPU is pegged at 100% the whole time
  Use case:
  grep iso hash.sha256 | rhash -c -
  Also fails: 
  Time rhash -c <(  grep iso hash.sha256 )
  5m55s
  Sha256sum works, identical 17s times for all 4

  Ubuntu studio jammy LTS
  rhash 1.4.2-1ubuntu1
  rhash -V
  RHash v1.4.2

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