[#72745] [Ruby trunk - Misc #11876] [Closed] Scheduled maintenance 2016/01/01 — shibata.hiroshi@...
Issue #11876 has been updated by Hiroshi SHIBATA.
shibata.hiroshi@gmail.com wrote:
[#72824] [Ruby trunk - Bug #11973] IO#advise should raise NotImplementedError on platforms that do not support that call — git@...
Issue #11973 has been updated by Chuck Remes.
[#72954] [Ruby trunk - Feature #12010] [Assigned] Exclude dot and dotdot from Dir#each — naruse@...
Issue #12010 has been reported by Yui NARUSE.
naruse@airemix.jp wrote:
[#73313] [Ruby trunk - Bug #12007] [Open] Newly added Unicode data file doesn't get downloaded — shugo@...
Issue #12007 has been updated by Shugo Maeda.
[#73372] [Ruby trunk - Misc #12004] Code of Conduct — benton@...
Issue #12004 has been updated by Benton Barnett.
On Sun, Jan 24, 2016 at 5:13 PM, <benton@bentonbarnett.com> wrote:
[#73421] [Ruby trunk - Misc #12004] Code of Conduct — nekocat432@...
Issue #12004 has been updated by Ruby Dino.
I’m sorry, but this, like the code of merit, is merely a derailing tactic.
On 2016/01/26 01:32, Austin Ziegler wrote:
On Tue, Jan 26, 2016 at 12:25 AM, Martin J. Dürst <duerst@it.aoyama.ac.jp>
[#73491] [Ruby trunk - Misc #12004] Code of Conduct — git@...
Issue #12004 has been updated by Chuck Remes.
They will never provide any numbers because they are not engineers and they
Coraline is a panelist on Ruby rogues and a very well respected member of
OK, sorry for previous comment. Let's try this way.
On Tue, Jan 26, 2016 at 5:15 PM, Andrew Kirilenko <
[#73558] [Ruby trunk - Misc #12004] Code of Conduct — andrew.kirilenko@...
Issue #12004 has been updated by Andrew Kirilenko.
Andrew, please stop digging. Your hole is only getting deeper.
>Andrew, please stop digging. Your hole is only getting deeper.
[#73586] [Ruby trunk - Misc #12004] Code of Conduct — andrew@...
Issue #12004 has been updated by Andrew Vit.
[#73593] [Ruby trunk - Bug #12034] RegExp does not respect file encoding directive — nobu@...
Issue #12034 has been updated by Nobuyoshi Nakada.
[ruby-core:73535] [Ruby trunk - Feature #12024] Add String.buffer, for creating strings with large capacities
Issue #12024 has been updated by Yui NARUSE.
```ruby
% cat test.rb
# frozen_string_literal: true
require 'benchmark'
N = 50_000_000
Benchmark.bm 5 do |r|
r.report "buffer" do
i = 0
buf = String.buffer(N)
while i < N
buf << 'a'
i += 1
end
end
r.report "normal" do
i = 0
buf = String.new
while i < N
buf << 'a'
i += 1
end
end
end
```
On FreeBSD
```
% ./ruby test.rb
user system total real
buffer 6.765625 0.039062 6.804688 ( 6.802679)
normal 6.796875 0.062500 6.859375 ( 6.864754)
```
----------------------------------------
Feature #12024: Add String.buffer, for creating strings with large capacities
https://bugs.ruby-lang.org/issues/12024#change-56748
* Author: Jeremy Evans
* Status: Open
* Priority: Normal
* Assignee:
----------------------------------------
If you know you are going to need to create a large string,
it's better to create it with a large capacity. Otherwise,
ruby will need to continuously resize the string as it grows.
For example, if you will be producing a string that is
100000 bytes, String.buffer(100000) will avoid 10 separate
resizes compared to using String.new.
Performance-wise, String.new is 1.33x slower than
String.buffer(100000) if appending in 1000 byte chunks,
and 1.64x slower than String.buffer(1000) if appending
in 100 byte chunks.
To make sure this works correctly with String subclasses,
a static rb_str_buf_new_with_class function is added, which
both String.buffer and rb_str_buf_new now call.
---Files--------------------------------
0001-Add-String.buffer-for-creating-strings-with-large-ca.patch (3.53 KB)
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