| Commit message (Collapse) | Author | Age | Files | Lines |
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The `url_for` methods in `actionpack` and `actionview`
now make a copy of the provided options
before generating polymorphic paths or URLs.
The bug in the previous behavior
is most noticeable in a case like:
url_options = [:new, :post, param: 'value']
if current_page?(url_options)
css_class = "active"
end
link_to "New Post", url_options, class: css_class
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Controllers should always have a request and response when responding.
Since we make this The Rule(tm), then controllers don't need to be
somewhere in limbo between "asking a response object for a rack
response" or "I, myself contain a rack response". This duality leads to
conditionals spread through the codebase that we can delete:
* https://github.com/rails/rails/blob/85a78d9358aa728298cd020cdc842b55c16f9549/actionpack/lib/action_controller/metal.rb#L221-L223
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This saves a lambda and request allocation on each request.
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controllers should always go through the `action` class method so that
their middleware is respected.
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now the caller can just treat it like a regular controller even though
it will return a 404
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the dispatcher class isn't configurable anymore, so pull up allocation
to the method that needs it.
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Now that we don't have subclasses depending on this method (they augment
the request class instead of the dispatch class) we can remove this
method and directly ask the request object for the controller class
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we don't need it anymore. We always use the same dispatcher in tests.
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controller class resolution has been moved to the request object, so we
should override that method instead of relying on the RouteSet to
generate the controller class.
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Since none of the action pack tests failed without this conditional it
didn't seem necessary. This fixes the build because it correctly returns
a 404 instead of a 500 for the asset routes test.
Test that was failing was in the `assets_test.rb` file and was the test
named `test_assets_routes_are_not_drawn_when_compilation_is_disabled`.
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This refactoring moves the controller class name that was on the route
set to the request. The purpose of this refactoring is for changes we
need to move controller tests to integration tests, mainly being able to
access the controller on the request instead of having to go through
the router.
[Eileen M. Uchitelle & Aaron Patterson]
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`ActiveSupport::Dependencies.constantize(const_name)` calls
`Reference.new` which is defined as
`ActiveSupport::Dependencies.constantize(const_name)` meaning this call
is already cached and we're doing caching that isn't necessary.
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This way we can make the Route object a read-only data structure.
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nobody should be touching the routes hash without going through the
NamedRouteCollection object.
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We shouldn't be messing with the NamedRouteCollection internals. Just
ask the object if the named route is in there.
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```ruby
require 'action_pack'
require 'action_dispatch'
require 'benchmark/ips'
route_set = ActionDispatch::Routing::RouteSet.new
routes = ActionDispatch::Routing::Mapper.new route_set
ObjectSpace::AllocationTracer.setup(%i{path line type})
result = ObjectSpace::AllocationTracer.trace do
500.times do
routes.resources :foo
end
end
sorted = ObjectSpace::AllocationTracer.allocated_count_table.sort_by(&:last)
sorted.each do |k,v|
next if v == 0
p k => v
end
__END__
Before:
{:T_SYMBOL=>11}
{:T_REGEXP=>17}
{:T_STRUCT=>6500}
{:T_MATCH=>12004}
{:T_OBJECT=>99009}
{:T_DATA=>100088}
{:T_HASH=>122015}
{:T_STRING=>159637}
{:T_IMEMO=>363134}
{:T_ARRAY=>433056}
After:
{:T_SYMBOL=>11}
{:T_REGEXP=>17}
{:T_STRUCT=>6500}
{:T_MATCH=>12004}
{:T_OBJECT=>91009}
{:T_DATA=>100088}
{:T_HASH=>114013}
{:T_STRING=>159637}
{:T_ARRAY=>321056}
{:T_IMEMO=>351133}
```
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Rather than building a regexp for every route, lets use the strategy
pattern to select among objects that can match HTTP verbs. This commit
introduces strategy objects for each verb that has a predicate method on
the request object like `get?`, `post?`, etc.
When we build the route object, look up the strategy for the verbs the
user specified. If we can't find it, fall back on string matching.
Using a strategy / null object pattern (the `All` VerbMatcher is our
"null" object in this case) we can:
1) Remove conditionals
2) Drop boot time allocations
2) Drop run time allocations
3) Improve runtime performance
Here is our boot time allocation benchmark:
```ruby
require 'action_pack'
require 'action_dispatch'
route_set = ActionDispatch::Routing::RouteSet.new
routes = ActionDispatch::Routing::Mapper.new route_set
result = ObjectSpace::AllocationTracer.trace do
500.times do
routes.resources :foo
end
end
sorted = ObjectSpace::AllocationTracer.allocated_count_table.sort_by(&:last)
sorted.each do |k,v|
next if v == 0
p k => v
end
__END__
Before:
$ be ruby -rallocation_tracer route_test.rb
{:T_SYMBOL=>11}
{:T_REGEXP=>4017}
{:T_STRUCT=>6500}
{:T_MATCH=>12004}
{:T_DATA=>84092}
{:T_OBJECT=>99009}
{:T_HASH=>122015}
{:T_STRING=>216652}
{:T_IMEMO=>355137}
{:T_ARRAY=>441057}
After:
$ be ruby -rallocation_tracer route_test.rb
{:T_SYMBOL=>11}
{:T_REGEXP=>17}
{:T_STRUCT=>6500}
{:T_MATCH=>12004}
{:T_DATA=>84092}
{:T_OBJECT=>99009}
{:T_HASH=>122015}
{:T_STRING=>172647}
{:T_IMEMO=>355136}
{:T_ARRAY=>433056}
```
This benchmark adds 500 resources. Each resource has 8 routes, so it
adds 4000 routes. You can see from the results that this patch
eliminates 4000 Regexp allocations, ~44000 String allocations, and ~8000
Array allocations. With that, we can figure out that the previous code
would allocate 1 regexp, 11 strings, and 2 arrays per route *more* than
this patch in order to handle verb matching.
Next lets look at runtime allocations:
```ruby
require 'action_pack'
require 'action_dispatch'
require 'benchmark/ips'
route_set = ActionDispatch::Routing::RouteSet.new
routes = ActionDispatch::Routing::Mapper.new route_set
routes.resources :foo
route = route_set.routes.first
request = ActionDispatch::Request.new("REQUEST_METHOD" => "GET")
result = ObjectSpace::AllocationTracer.trace do
500.times do
route.matches? request
end
end
sorted = ObjectSpace::AllocationTracer.allocated_count_table.sort_by(&:last)
sorted.each do |k,v|
next if v == 0
p k => v
end
__END__
Before:
$ be ruby -rallocation_tracer route_test.rb
{:T_MATCH=>500}
{:T_STRING=>501}
{:T_IMEMO=>1501}
After:
$ be ruby -rallocation_tracer route_test.rb
{:T_IMEMO=>1001}
```
This benchmark runs 500 calls against the `matches?` method on the route
object. We check this method in the case that there are two methods
that match the same path, but they are differentiated by the verb (or
other conditionals). For example `POST /users` vs `GET /users`, same
path, different action.
Previously, we were using regexps to match against the verb. You can
see that doing the regexp match would allocate 1 match object and 1
string object each time it was called. This patch eliminates those
allocations.
Next lets look at runtime performance.
```ruby
require 'action_pack'
require 'action_dispatch'
require 'benchmark/ips'
route_set = ActionDispatch::Routing::RouteSet.new
routes = ActionDispatch::Routing::Mapper.new route_set
routes.resources :foo
route = route_set.routes.first
match = ActionDispatch::Request.new("REQUEST_METHOD" => "GET")
no_match = ActionDispatch::Request.new("REQUEST_METHOD" => "POST")
Benchmark.ips do |x|
x.report("match") do
route.matches? match
end
x.report("no match") do
route.matches? no_match
end
end
__END__
Before:
$ be ruby -rallocation_tracer runtime.rb
Calculating -------------------------------------
match 17.145k i/100ms
no match 24.244k i/100ms
-------------------------------------------------
match 259.708k (± 4.3%) i/s - 1.303M
no match 453.376k (± 5.9%) i/s - 2.279M
After:
$ be ruby -rallocation_tracer runtime.rb
Calculating -------------------------------------
match 23.958k i/100ms
no match 29.402k i/100ms
-------------------------------------------------
match 465.063k (± 3.8%) i/s - 2.324M
no match 691.956k (± 4.5%) i/s - 3.469M
```
This tests tries to see how many times it can match a request per
second. Switching to method calls and string comparison makes the
successful match case about 79% faster, and the unsuccessful case about
52% faster.
That was fun!
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We don't need to add and delete from the conditions hash anymore, just
pass the regexp directly to the constructor.
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I want to change the real constructor to take a particular parameter for
matching the request method
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The string we create is almost always the same, so rather than joining
all the time, lets join once, then reuse that string everywhere.
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I would like to change the signature of the Route constructor. Since
the mapping object has all the data required to construct a Route
object, move the allocation to a factory method.
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we can directly turn it in to a regular expression here, so we don't
need to test its value twice
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The outer router object already keeps a hash of named routes, so we
should just use that.
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refactor the tests with a backwards compatible method call so we can rm
add_route2 from the journey router
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then we can let the mapping object derive stuff that the Route object
needs.
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now that we aren't doing options manipulations, we can just pass the
mapping object down and read values from it.
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since we've extracted the `to` initialization, there's no need for
`process_path`
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if `to` was initialized, this method would return, so we can eliminate
the to ||= in the conditional. Finally, let's return a nil in the else
block so that it's explicit that this method can return nil
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Eventually we'll pull this up and delete `process_path`.
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We don't need a method for something like this. I want to pull this up
the stack as well and move the module + :controller ArgumentError up the
stack as well
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now we don't need to add it to a hash and delete it from the hash later
just to pass it around
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`add_route` needs the AST, so rather than shove it in a hash and delete
later, lets move parsing up the stack so we can pass down later
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we don't need to keep adding it and deleting if from hashes.
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Eventually I want to pull up AST generation so that we don't have to add
it to the `conditions` hash.
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It just constructs a Path::Pattern object with the AST that it already
has
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This was a useless object. We can just directly construct a
Path::Pattern object without a Strexp object.
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the caller already has it, there is no reason to pack it in to an object
and just throw that object away.
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we always pass all parameters, so there is no reason to provide default
arguments.
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the caller already has access to `as`, so we can stop passing it around.
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the same value that is extracted from the options hash earlier is
returned, so we don't need to pass it in in the first place. The caller
already has the data, so stop passing it around.
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this way we don't have to mutate the options hash so far away from where
the user passed it in
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The `anchor` parameter [is overridden](https://github.com/rails/rails/blob/b4b4a611d0eb9aa1c640c5f521c6a43bf2a65bab/actionpack/lib/action_dispatch/routing/mapper.rb#L1528) unless it
is directly passed to `match`, so setting it in a scope must be a
mistake.
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