With CodeFly you can execute parallel / asynchronous code in Rails, in a easy way.
This is how a classic code looks like:
@blue_cars = Vehicle.where(type: "car", color: "blue") # 0.1 sec
@accessories = Accessory.where(type: "car") # 0.1 sec
# some code
# some code using @blue_cars and @accessoriesThis is how a flied code looks like:
fly(:A) { @blue_cars = Vehicle.where(type: "car", color: "blue") } # 0.1 sec
fly(:B) { @accessories = Accessory.where(type: "car") } # 0.1 sec
# some code
wait_fly(:A, :B)
# some code using @blue_cars and @accessoriesThe first code will take 0.2 sec, but the second will take only 0.1 sec, the twice of speed. On the second code, the A and B queries will be executed at the same time (I will assume that your DB have more than 1 core), and the Ruby will be freed to execute another code while these 2 queries are being processed.
The CodeFly methods are:
- fly(id) { async code }
- wait_fly(id_1[, id_2, …]): block until the async codes terminate
Advanced techniques
You can use CodeFly to make prediction algorithms:
fly(:ans_a) { @blue_cars = Vehicle.where(type: "car", color: "blue") }
fly(:ans_b) { @yellow_cars = Vehicle.where(type: "car", color: "yellow") }
fly(:ans_c) { @other_cars = Vehicle.where(type: "car") }
wait_fly(:ans_a)
if @blue_cars.present?
# ...
else
wait_fly(:ans_b)
if @yellow_cars.present?
#...
else
wait_fly(:ans_c)
#...
end
endIn this sample, you are triggering the all queries before you know what you need. So at the time that we get the first answer, the db probally provide us the others answers, saving time.