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#!/usr/bin/env ruby | |
require 'erb' | |
require 'open3' | |
# == Code generation ==================================================================================== | |
def scenario_multi_call(callsite_count) | |
ERB.new(<<-HERE).result(binding) | |
#include "continuable/continuable.hpp" | |
__attribute__((noinline)) cti::continuable<int> sum(int a, int b) { | |
return cti::make_ready_continuable(a + b); | |
} | |
__attribute__((noinline)) void printSum(int) {} | |
int main() { | |
<% callsite_count.times %> | |
sum(5, 2) | |
.then([](int theSum) { | |
printSum(theSum); | |
}); | |
<% end %> | |
} | |
HERE | |
end | |
def scenario_multi_then(then_count) | |
ERB.new(<<-HERE).result(binding) | |
#include "continuable/continuable.hpp" | |
__attribute__((noinline)) cti::continuable<int> sum(int a, int b) { | |
return cti::make_ready_continuable(a + b); | |
} | |
__attribute__((noinline)) void printSum(int) {} | |
int main() { | |
sum(5, 2) | |
<% then_count.times do %> | |
.then([](int theSum) { | |
printSum(theSum); | |
return theSum; | |
}) | |
<% end %> | |
; | |
} | |
HERE | |
end | |
def scenario_combined(callsite_count) | |
then_count = 2 # Hardcoded, average number of .then/.fail per callsite | |
ERB.new(<<-HERE).result(binding) | |
#include "continuable/continuable.hpp" | |
__attribute__((noinline)) cti::continuable<int> sum(int a, int b) { | |
return cti::make_ready_continuable(a + b); | |
} | |
__attribute__((noinline)) void printSum(int) {} | |
int main() { | |
<% callsite_count.times do %> | |
sum(5, 2) | |
<% then_count.times do %> | |
.then([](int theSum) { | |
printSum(theSum); | |
return theSum; | |
}) | |
<% end %> | |
; | |
<% end %> | |
} | |
HERE | |
end | |
# == Build ============================================================================================== | |
COMMAND_LINE = "g++ -O3 -o a.out -x c++ --std=c++17 -Ifunction2/include -Icontinuable/include -fno-exceptions -fno-rtti -fno-asynchronous-unwind-tables -fno-stack-protector -" | |
CompileResult = Struct.new(:bytecount, :bytecount_stripped, :compiletime) | |
def compile(sourcecode) | |
start = Time.now | |
_, error, _ = Open3.capture3(COMMAND_LINE, stdin_data: sourcecode) | |
finish = Time.now | |
raise error unless error.strip.empty? | |
unstripped_filesize = File.size('a.out') | |
system('strip a.out') | |
stripped_filesize = File.size('a.out') | |
CompileResult.new.tap do |result| | |
result.bytecount = unstripped_filesize | |
result.bytecount_stripped = stripped_filesize | |
result.compiletime = ((finish - start) * 1000).to_i | |
end | |
end | |
def best_compilation_result(results) | |
CompileResult.new.tap do |result| | |
result.bytecount = results.map(&:bytecount).min | |
result.bytecount_stripped = results.map(&:bytecount_stripped).min | |
result.compiletime = results.map(&:compiletime).min | |
end | |
end | |
# == Collection and reporting =========================================================================== | |
def execute_scenario(lower_bound, upper_bound, diff = 1) | |
puts 'n,compilation time,bytecount,bytecount stripped' | |
observations = lower_bound.step(upper_bound, diff).each do |n| | |
results = best_compilation_result(3.times.map { compile(yield(n)) }) | |
puts [n, results.compiletime, results.bytecount, results.bytecount_stripped].join(',') | |
end | |
end | |
# == Execution ========================================================================================== | |
scenarios = { | |
'multi_call' => method(:scenario_multi_call), | |
'multi_then' => method(:scenario_multi_then), | |
'combined' => method(:scenario_combined) | |
} | |
scenario = scenarios[ARGV[0]] or raise 'Enter a valid scenario as first argument' | |
execute_scenario(0, 15, 1) { |n| scenario.call(n) } | |
# == Results multi_call ================================================================================= | |
# gcc version 9.2.1 20191008 (Ubuntu 9.2.1-9ubuntu2) | |
# | |
# n,compilation time,bytecount,bytecount stripped | |
# 0,1448,34688,26840 | |
# 1,1658,52784,35032 | |
# 2,1747,60000,35032 | |
# 3,1855,71032,39128 | |
# 4,1943,82072,43224 | |
# 5,1997,89008,43224 | |
# 6,2146,100048,47320 | |
# 7,2248,106984,47320 | |
# 8,2334,118024,51416 | |
# 9,2438,129056,55512 | |
# 10,2543,136000,55512 | |
# 11,2667,147032,59608 | |
# 12,2798,153992,59608 | |
# 13,2875,165048,63704 | |
# 14,2997,176104,67800 | |
# 15,3105,183056,67800 | |
# == Results multi_then ================================================================================= | |
# gcc version 9.2.1 20191008 (Ubuntu 9.2.1-9ubuntu2) | |
# | |
# n,compilation time,bytecount,bytecount stripped | |
# 0,1517,38136,26840 | |
# 1,1705,52768,35032 | |
# 2,1742,62648,39128 | |
# 3,1905,82200,51416 | |
# 4,2015,95080,59608 | |
# 5,2172,108352,67800 | |
# 6,2281,122016,75992 | |
# 7,2468,136080,84184 | |
# 8,2590,154624,96472 | |
# 9,2719,173568,108760 | |
# 10,2950,192904,121048 | |
# 11,3116,212624,133336 | |
# 12,3368,236848,149720 | |
# 13,3574,257376,162008 | |
# 14,3806,286504,182488 | |
# 15,4023,307832,194776 | |
# == Results combined =================================================================================== | |
# gcc version 9.2.1 20191008 (Ubuntu 9.2.1-9ubuntu2) | |
# | |
# n,compilation time,bytecount,bytecount stripped | |
# 0,1480,34688,26840 | |
# 25,7614,568920,174296 | |
# 50,14080,1093520,309464 | |
# 75,20959,1619408,448728 | |
# 100,28183,2142224,583896 | |
# 125,35155,2665032,719064 | |
# 150,43249,3192016,858328 | |
# 175,50720,3714824,993496 | |
# 200,58372,4237560,1128664 |
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