| Commit message (Collapse) | Author | Age | Files | Lines |
|---|
| ... | |
| |
|
|
|
|
| |
content_tag's first argument is will generate a string with an html tag so `:a` will generate: `<a></a>`. When this happens, the symbol is implicitly `to_s`-d so a new string is allocated. We can get around that by using a frozen string instead which
This change buys us 74,236 bytes of memory and 1,855 fewer objects per request.
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
I wrote a utility that helps find areas where you could optimize your program using a frozen string instead of a string literal, it's called [let_it_go](https://github.com/schneems/let_it_go). After going through the output and adding `.freeze` I was able to eliminate the creation of 1,114 string objects on EVERY request to [codetriage](codetriage.com). How does this impact execution?
To look at memory:
```ruby
require 'get_process_mem'
mem = GetProcessMem.new
GC.start
GC.disable
1_114.times { " " }
before = mem.mb
after = mem.mb
GC.enable
puts "Diff: #{after - before} mb"
```
Creating 1,114 string objects results in `Diff: 0.03125 mb` of RAM allocated on every request. Or 1mb every 32 requests.
To look at raw speed:
```ruby
require 'benchmark/ips'
number_of_objects_reduced = 1_114
Benchmark.ips do |x|
x.report("freeze") { number_of_objects_reduced.times { " ".freeze } }
x.report("no-freeze") { number_of_objects_reduced.times { " " } }
end
```
We get the results
```
Calculating -------------------------------------
freeze 1.428k i/100ms
no-freeze 609.000 i/100ms
-------------------------------------------------
freeze 14.363k (± 8.5%) i/s - 71.400k
no-freeze 6.084k (± 8.1%) i/s - 30.450k
```
Now we can do some maths:
```ruby
ips = 6_226k # iterations / 1 second
call_time_before = 1.0 / ips # seconds per iteration
ips = 15_254 # iterations / 1 second
call_time_after = 1.0 / ips # seconds per iteration
diff = call_time_before - call_time_after
number_of_objects_reduced * diff * 100
# => 0.4530373333993266 miliseconds saved per request
```
So we're shaving off 1 second of execution time for every 220 requests.
Is this going to be an insane speed boost to any Rails app: nope. Should we merge it: yep.
p.s. If you know of a method call that doesn't modify a string input such as [String#gsub](https://github.com/schneems/let_it_go/blob/b0e2da69f0cca87ab581022baa43291cdf48638c/lib/let_it_go/core_ext/string.rb#L37) please [give me a pull request to the appropriate file](https://github.com/schneems/let_it_go/blob/b0e2da69f0cca87ab581022baa43291cdf48638c/lib/let_it_go/core_ext/string.rb#L37), or open an issue in LetItGo so we can track and freeze more strings.
Keep those strings Frozen
|
| | |
|
| | |
|
| |
|
|
| |
This makes the behavior more consistent with `width` or `height` options
|
| |
|
|
| |
[skip ci]
|
| | |
|
| |
|
|
|
|
|
|
|
|
| |
This reverts commit c22a253d1a72602331db1eba3e91bc945eff2346.
Reason: Our documentation assumes the assets are in the proper place and
we are using the default Rails stack.
With the default Rails stack and the assets being in the correct place
the assets helpers uses the `/assets` prefix.
|
| | |
|
| | |
|
| |
|
|
| |
Motivated by #14907.
|
| |
|
|
|
|
|
|
| |
image/x-icon.
Although the official IANA-registered MIME type for ICO files is image/vnd.microsoft.icon,
registered in 2003, it was submitted to IANA by a third party and is not recognized by Microsoft products.
The MIME type image/x-icon should be used since is the one recognized by the major browsers on the market.
|
| |
|
| |
image_tag only supports :alt and :size as additional keys, not three.
|
| | |
|
| | |
|
| | |
|
| | |
|
| |
|
|
|
|
| |
rdoc: favicon source shouldn't begin with a slash to reference asset pipeline resource [ci skip]
Conflicts:
actionview/lib/action_view/helpers/asset_tag_helper.rb
|
| | |
|
| | |
|
| |
|
|
|
|
|
|
|
|
|
|
| |
ActionView::Helpers.asset_path is where the logic for
javascript_include_tag resides. It takes an extname option for
specifying the extension or false to not append it. This exposes that
option to javascript_include_tag.
Without the option files that didn't end with ".js" would get the
extension appended to them. This broke JST templates and other file
types that should be interpreted as JavaScript but who's file extension
isn't ".js"
|
| |
|
