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@1bardesign
Last active June 7, 2023 23:43
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prerelease basic profiler for lua, depends on batteries and uses lg as an alias for love.graphics - will be included in ferris at some point
Copyright 2023 Max Cahill
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
--measuring the time and memory allocated by a stretch of code
local profiler = class({
name = "profiler"
})
function profiler:new()
self._stack = {}
self._result = {}
end
function profiler:push(name)
if #self._stack == 0 then
--pushing a new frame
table.clear(self._result)
end
local block = {
name = name,
time = love.timer.getTime(),
memory = (collectgarbage("count") * 1024),
depth = #self._stack + 1,
}
table.insert(self._result, block)
table.insert(self._stack, block)
end
function profiler:pop(name)
local block = table.pop(self._stack)
assert:equal(name, block.name, "profiler block names should match")
block.time = (love.timer.getTime() - block.time) * 1000
block.memory = (collectgarbage("count") * 1024) - block.memory
end
function profiler:wrap_system(name, system)
if system.update then
system.update = self:wrap_function(name .. "_update", system.update)
end
if system.draw then
system.draw = self:wrap_function(name .. "_draw", system.draw)
end
return system
end
function profiler:wrap_function(name, f)
return function(...)
self:push(name)
local result = {f(...)} --capture
self:pop(name)
return unpack(result)
end
end
function profiler:result()
return table.copy(self._result)
end
function profiler:print_result()
lg.push()
local f = lg.getFont()
local line_height = f:getHeight() * f:getLineHeight()
for _, v in ipairs(self:result()) do
lg.setColor(0, 0, 0)
lg.rectangle("fill", -5, 0, 355, line_height)
lg.setColor(1, 1, 1)
lg.push()
lg.translate(v.depth * 10, 0)
lg.print(v.name, 0, 0)
lg.print(("%05.2fms"):format(v.time), 150, 0)
lg.print(("%04.2fmb"):format(v.memory / 1024 / 1024), 250, 0)
lg.pop()
lg.translate(0, line_height)
end
lg.pop()
end
return profiler
profiler = require("src.profiler")() --wherever you put it; global so that you can push/pop more frames "wherever"
--either put it in your main loop, or dos omething like this
function love.update(dt)
profiler:push("frame")
profiler:push("update")
--do all your update stuff here
profiler:pop("update")
end
function love.draw(t)
profiler:push("draw")
--draw everything
profiler:pop("draw")
profiler:pop("frame")
--draw the profiler on top if you're pressing `
if input.keyboard:pressed("`") then
lg.push()
lg.origin()
lg.translate(10, 10)
--set whatever font here
profiler:print_result()
lg.pop()
end
end
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