jtomschroeder / crystalline Goto Github PK
View Code? Open in Web Editor NEWA collection of containers & algorithms for the Crystal programming language
License: MIT License
A collection of containers & algorithms for the Crystal programming language
License: MIT License
So I tried to benchmark the priority queue against my own queue with the following code to benchmark the code in this repo, and I find the results I get pretty strange.
require "benchmark"
require "./priority_queue"
values = 100_000.times.map { rand(100_000_000) }.to_a
Benchmark.bm do |x|
queue = PriorityQueue(Int32).new
x.report("crystalline - push") {
values.each do |v|
queue.push(v, v)
end
}
x.report("crystalline - pop") {
values.size.times do |v|
queue.pop
end
}
puts queue.size
queue2 = PriorityQueue(Int32).new
x.report("crystalline - mixed") {
values.each_with_index do |v, i|
queue2.push(v, v)
if i % 4 == 0
queue2.pop
end
end
}
puts queue2.size
end
This outputs
linus@donk:~/prog/pairing_heap$ crystal run src/benchmark.cr --release --no-debug
0
0
user system total real
crystalline - push 55.120000 1.290000 56.410000 ( 36.032381)
crystalline - pop 0.440000 0.000000 0.440000 ( 0.261351)
crystalline - mixed 0.120000 0.000000 0.120000 ( 0.069474)
The disconnect between push
and mixed
is pretty staggering.
For the record, my queue is at https://github.com/yxhuvud/pairing_heap/blob/master/src/priority_queue.cr . It is faster but has slightly different semantics(it picks the least number for starters) and other method names, but it could be interesting to compare against.
I am in need of an Ordered Set and am planning to implement one from this library implementation of Red Black tree.
As such to avoid code duplication, I will reimplement the RB Tree Map as an RB Set of pairs. What do you think of it?
While I can lock this library to a particular SHA in my shard.yml
, it'd be nice to have a shard.yml
with a version so that there can be some semblance of semver throughout the project lifetime.
Thanks for making a great collection!
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