From: Eric Wong <e@80x24.org>
To: yahns-public@yhbt.net
Subject: [PATCH] tee_input: simplify conditional for writing to temporary file
Date: Sat, 31 Dec 2016 04:39:49 +0000 [thread overview]
Message-ID: <20161231043949.7301-1-e@80x24.org> (raw)
It's rare to have an empty string returned by `read` since it
requires a length argument of zero (careless) or nil (danger!
OOM!). Lets not try to optimize away a method dispatch in this
case by checking .size (optimized instruction in YARV).
Ruby IO#write already treats writing an empty string as a noop,
so no syscall is saved.
n.b. `gets` can return an empty string, too, but that's also
dangerous w.r.t. memory usage on untrusted input.
---
lib/yahns/tee_input.rb | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/lib/yahns/tee_input.rb b/lib/yahns/tee_input.rb
index 93ec148..90c8fd6 100644
--- a/lib/yahns/tee_input.rb
+++ b/lib/yahns/tee_input.rb
@@ -104,9 +104,7 @@ def consume!
end
def tee(buffer)
- if buffer && buffer.size > 0
- @tmp.write(buffer)
- end
+ @tmp.write(buffer) if buffer
buffer
end
--
EW
reply other threads:[~2016-12-31 4:39 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://yhbt.net/yahns/README
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20161231043949.7301-1-e@80x24.org \
--to=e@80x24.org \
--cc=yahns-public@yhbt.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://yhbt.net/yahns.git/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).