non auto load in concurrency

rubyonrails-core
1

I am under the impression that if config.threadsafe! was set that it preloaded all files in the require paths, instead of using autoload.

Suggestion: use autoload when threadsafe!, but with a wrapper, like

autoload :Command, 'thin/command'

becomes

autoload :Command, 'wrappers/ file_that_loads_command_but_in_a_mutex.rb'

Then it might avoid loading unused dependencies in production, thus saving on RAM and GC times. Thoughts? -r

2

Unfortunately, simply requiring the files in a mutex won’t work. Consider the following simplified example:

person.rb

class Person

sleep 10

def say_hello

puts “Hello”

end

end

mutexed autoloads

def const_missing(klass)

@mutex.synchronize do

require autoload[klass]

end

end

usage

Thread.new do

this will trigger person.rb, which will immediately make Person available, but

not add say_hello

Person.say_hello

end

Thread.new do

Person is already created, so the const_missing will not fire (or autoload, etc.)

but say_hello is not yet defined

Person.say_hello

end

Yehuda Katz Architect | Engine Yard (ph) 718.877.1325

3

Interesting. I suppose you'd have to somehow restrict it, which is probably impossible. Ok, thanks for your feedback. -r