| Commit message (Collapse) | Author | Age | Files | Lines |
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Remove duplicated `Array#to_param`
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`Array#to_param` is defind in active_support/core_ext/object/to_query.rb,
so we can call `to_param` if value is_a Array.
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Fix Encoding::UndefinedConversionError with multibyte UTF-8 filename containing "%" character
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we don't recycle requests anymore, so we shouldn't need to recycle
cookie jars
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this prevents the middleware from knowing the specific key for the jar
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This changes the chained jars to ask the parent jar for the request
object which should eventually call back up to the original jar
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eventually we will make the cookie jar derive these values from the
request object rather than save a reference to the values
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The cookie jar can just ask the request object for the information it
needs. This allows us to stop allocating hashes for options, and also
allows us to delay calculating values in advance. Generating the
options hash forced us to calculate values that we may never have needed
at runtime
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Accessing a request object has nice advantages over accessing a hash.
If you use a missing method name, you'll get an exception rather than a
`nil` (is one nice feature)
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This decouples the `call` method from knowing the SCRIPT_NAME key and
offloads decisions about how to access script_name
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While the readability may be slightly worse, the speed improvement is
significant: Twice as fast when there's no leading "/" to remove, and
over 4 times as fast when there is a leading "/".
Benchmark:
require 'benchmark/ips'
def match(controller)
if controller
if m = controller.match(/\A\/(?<controller_without_leading_slash>.*)/)
m[:controller_without_leading_slash]
else
controller
end
end
end
def start_with(controller)
if controller
if controller.start_with?('/'.freeze)
controller[1..-1]
else
controller
end
end
end
Benchmark.ips do |x|
x.report("match") { match("no_leading_slash") }
x.report("start_with") { start_with("no_leading_slash") }
x.compare!
end
Benchmark.ips do |x|
x.report("match") { match("/a_leading_slash") }
x.report("start_with") { start_with("/a_leading_slash") }
x.compare!
end
Result (Ruby 2.2.2):
Calculating -------------------------------------
match 70.324k i/100ms
start_with 111.264k i/100ms
-------------------------------------------------
match 1.468M (± 7.1%) i/s - 7.314M
start_with 3.787M (± 3.5%) i/s - 18.915M
Comparison:
start_with: 3787389.4 i/s
match: 1467636.4 i/s - 2.58x slower
Calculating -------------------------------------
match 36.694k i/100ms
start_with 86.071k i/100ms
-------------------------------------------------
match 532.795k (± 4.7%) i/s - 2.679M
start_with 2.518M (± 5.8%) i/s - 12.566M
Comparison:
start_with: 2518366.8 i/s
match: 532794.5 i/s - 4.73x slower
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Add descriptions about `ActiveRecord::Base#to_param` to
* `ActionDispatch::Routing::Base#match`
* Overriding Named Route Parameters (guide)
When passes `:param` to route definision, always `to_param` method of
related model is overridden to constructe an URL by passing these
model instance to named_helper.
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```
empty_array = []
small_array = [1] * 30
bigger_array = [1] * 300
Benchmark.ips do |x|
x.report('empty !empty?') { !empty_array.empty? }
x.report('small !empty?') { !small_array.empty? }
x.report('bigger !empty?') { !bigger_array.empty? }
x.report('empty any?') { empty_array.any? }
x.report('small any?') { small_array.any? }
x.report('bigger any?') { bigger_array.any? }
end
```
```
Calculating -------------------------------------
empty !empty? 132.059k i/100ms
small !empty? 133.974k i/100ms
bigger !empty? 133.848k i/100ms
empty any? 106.924k i/100ms
small any? 85.525k i/100ms
bigger any? 86.663k i/100ms
-------------------------------------------------
empty !empty? 8.522M (± 7.9%) i/s - 42.391M
small !empty? 8.501M (± 8.5%) i/s - 42.202M
bigger !empty? 8.434M (± 8.6%) i/s - 41.894M
empty any? 4.161M (± 8.3%) i/s - 20.743M
small any? 2.654M (± 5.2%) i/s - 13.256M
bigger any? 2.642M (± 6.4%) i/s - 13.173M
```
Ref: https://github.com/rails/rails/pull/21057#discussion_r35902468
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It is slightly faster:
```
Calculating -------------------------------------
each; delete 35.166k i/100ms
delete_if 36.416k i/100ms
-------------------------------------------------
each; delete 478.026k (± 8.5%) i/s - 2.391M
delete_if 485.123k (± 7.9%) i/s - 2.440M
```
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We don't always need an array when generating a url with the formatter. We can be lazy about allocating the `missing_keys` array. This saves us:
35,606 bytes and 889 objects per request
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THe only reason we were allocating an array is to get the "missing_keys" variable in scope of the error message generator. Guess what? Arrays kinda take up a lot of memory, so by replacing that with a nil, we save:
35,303 bytes and 886 objects per request
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If we don't mutate the `recall` hash, then there's no reason to duplicate it. While this change doesn't get rid of that many objects, each hash object it gets rid of was massive.
Saves 888 string objects per request, 206,013 bytes (thats 0.2 mb which is kinda a lot).
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Instead of calling `sub` on every link_to call for controller, we can detect when the string __needs__ to be allocated and only then create a new string (without the leading slash), otherwise, use the string that is given to us.
Saves 888 string objects per request, 35,524 bytes.
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Saves 888 string objects per request.
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When `defaults[key]` in `generate` in the journey formatter is called, it often returns a `nil` when we call `to_s` on a nil, it allocates an empty string. We can skip this check when the default value is nil.
This change buys us 35,431 bytes of memory and 887 fewer objects per request.
Thanks to @matthewd for help with the readability
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When generating a url with `url_for` the hash of arguments passed in, is dup-d and merged a TON. I wish I could clean this up better, and might be able to do it in the future. This change removes one dup, since it's literally right after we just dup-d the hash to pass into this constructor.
This may be a breaking, change but the tests pass...so :shipit: we can revert if it causes problems
This change buys us 205,933 bytes of memory and 887 fewer objects per request.
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In handle_positional_args `Array#-=` is used which allocates a new array. Instead we can iterate through and delete elements, modifying the array in place.
Also `Array#take` allocates a new array. We can build the same by iterating over the other element.
This change buys us 106,470 bytes of memory and 2,663 fewer objects per request.
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Most routes have a `route.path.requirements[key]` of `/[-_.a-zA-Z0-9]+\/[-_.a-zA-Z0-9]+/` yet every time this method is called a new regex is generated on the fly with `/\A#{DEFAULT_INPUT}\Z/`. OBJECT ALLOCATIONS BLERG!
This change uses a special module that implements `===` so it can be used in a case statement to pull out the default input. When this happens, we use a pre-generated regex.
This change buys us 1,643,465 bytes of memory and 7,990 fewer objects per request.
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Micro optimization: `reverse.drop_while` is slower than `reverse_each.drop_while`. This doesn't save any object allocations.
Second, `keys_to_keep` is typically a very small array. The operation `parameterized_parts.keys - keys_to_keep` actually allocates two arrays. It is quicker (I benchmarked) to iterate over each and check inclusion in array manually.
This change buys us 1774 fewer objects per request
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Document, refactor and create test case for ActionDispatch::Response
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ActionDispatch::Response#charset= method
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Now that we have encoding strategies, we can just walk the params hash
once to encode as HWIA, and remove nils.
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we'll refactor deep munge mostly out of existence shortly
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This should have been done along with 8f8ccb9901cab457c6e1d52bdb25acf658fd5777
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this just pushes the conditional in to the case / when so we can switch
to method dispatch later
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Remove unnecessary `dup` from Mapper `add_route`
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The `dup` was introduced by c4106d0c08954b0761726e0015ec601b7bc7ea4b
to work around a frozen key. Nowadays, the string is already being
duplicated by the `tr` in `options[:action] ||= action.tr('-', '_')`
and later joined into a new string in `name_for_action`.
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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
![](https://www.dropbox.com/s/z4dj9fdsv213r4v/let-it-go.gif?dl=1)
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This will silence deprecation warnings.
Most of the test can be changed from `render :text` to render `:plain`
or `render :body` right away. However, there are some tests that needed
to be fixed by hand as they actually assert the default Content-Type
returned from `render :body`.
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This is another take at #14384 as we decided to wait until `master` is
targeting Rails 5.0. This commit is implementation-complete, as it
guarantees that all the public methods on the hash-inherited Parameters
are still working (based on test case). We can decide to follow-up later
if we want to remove some methods out from Parameters.
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Rack [already implements `redirect?` on the response object](https://github.com/rack/rack/blob/1569a985e17d9caaf94d0e97d95ef642c4ab14ba/lib/rack/response.rb#L141) so we don't need to implement our own.
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We shouldn't depend on specific methods imlemented in the TestResponse
subclass because the response could actually be a real response object.
In the future, we should either push the aliased predicate methods in
TestResponse up to the real response object, or remove them
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