Add LuaJIT FFI optimizations for memory management
- New FFI module with object pooling for Vec2, Rect, Timer structs - Integrated FFI into LayoutEngine, Performance, and Color modules - Graceful fallback to standard Lua when LuaJIT unavailable - Added ffi_comparison_profile.lua for automated benchmarking - Comprehensive documentation of gains and real bottlenecks Reality: 5-10% performance improvement (marginal gains) FFI targets wrong bottleneck - real issue is O(n²) layout algorithm See PERFORMANCE_ANALYSIS.md for high-impact optimizations (2-3x gains)
This commit is contained in:
Michael Freno
235
profiling/__profiles__/ffi_comparison_profile.lua
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235
profiling/__profiles__/ffi_comparison_profile.lua
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local FlexLove = require("FlexLove")
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local PerformanceProfiler = require("profiling.utils.PerformanceProfiler")
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local profile = {}
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local profiler = PerformanceProfiler.new()
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local elementCount = 100
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local elements = {}
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local currentPhase = "warmup"
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local phaseFrames = 0
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local targetFrames = 300 -- Collect 300 frames per phase
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-- Test phases
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local phases = {
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{ count = 50, label = "50 Elements" },
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{ count = 100, label = "100 Elements" },
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{ count = 200, label = "200 Elements" },
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{ count = 500, label = "500 Elements" },
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{ count = 1000, label = "1000 Elements" },
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}
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local currentPhaseIndex = 0
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function profile.init()
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-- Initialize FlexLove with performance monitoring
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FlexLove.init({
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performanceMonitoring = true,
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immediateMode = false,
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})
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profile.reset()
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currentPhase = "warmup"
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phaseFrames = 0
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currentPhaseIndex = 0
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end
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function profile.update(dt)
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profiler:beginFrame()
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-- Mark layout timing
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profiler:markBegin("layout")
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FlexLove.update(dt)
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profiler:markEnd("layout")
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profiler:endFrame()
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-- Phase management
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if currentPhase == "warmup" then
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phaseFrames = phaseFrames + 1
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if phaseFrames >= 60 then -- 1 second warmup
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currentPhase = "testing"
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phaseFrames = 0
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currentPhaseIndex = currentPhaseIndex + 1
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if currentPhaseIndex <= #phases then
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local phase = phases[currentPhaseIndex]
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elementCount = phase.count
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profile.reset()
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profiler:reset()
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end
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end
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elseif currentPhase == "testing" then
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phaseFrames = phaseFrames + 1
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if phaseFrames >= targetFrames then
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-- Take snapshot
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local phase = phases[currentPhaseIndex]
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local ffiEnabled = FlexLove._FFI and FlexLove._FFI.enabled
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profiler:createSnapshot(phase.label, {
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elementCount = phase.count,
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ffiEnabled = ffiEnabled,
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ffiStatus = ffiEnabled and "LuaJIT FFI" or "Standard Lua",
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})
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-- Move to next phase
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currentPhaseIndex = currentPhaseIndex + 1
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if currentPhaseIndex <= #phases then
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currentPhase = "warmup"
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phaseFrames = 0
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else
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currentPhase = "complete"
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end
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end
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end
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end
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function profile.draw()
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FlexLove.draw()
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-- Draw profiler overlay
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profiler:draw(10, 10, 400, 320)
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-- Draw phase info
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love.graphics.setColor(0, 0, 0, 0.8)
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love.graphics.rectangle("fill", 10, 340, 400, 140)
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love.graphics.setColor(1, 1, 1, 1)
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local y = 350
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local lineHeight = 18
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-- FFI Status
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local ffiStatus = "Standard Lua (No FFI)"
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if FlexLove._FFI and FlexLove._FFI.enabled then
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ffiStatus = "LuaJIT FFI Enabled ✓"
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love.graphics.setColor(0, 1, 0, 1)
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else
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love.graphics.setColor(1, 0.5, 0, 1)
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end
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love.graphics.print("Status: " .. ffiStatus, 20, y)
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y = y + lineHeight + 5
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-- Phase info
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love.graphics.setColor(1, 1, 1, 1)
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if currentPhase == "warmup" then
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love.graphics.print(string.format("Phase: Warmup (%d/%d frames)", phaseFrames, 60), 20, y)
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elseif currentPhase == "testing" then
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local phase = phases[currentPhaseIndex]
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love.graphics.print(string.format("Phase: %s (%d/%d frames)", phase.label, phaseFrames, targetFrames), 20, y)
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-- Progress bar
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local progress = phaseFrames / targetFrames
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love.graphics.setColor(0.3, 0.3, 0.3, 1)
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love.graphics.rectangle("fill", 20, y + 20, 360, 10)
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love.graphics.setColor(0, 1, 0, 1)
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love.graphics.rectangle("fill", 20, y + 20, 360 * progress, 10)
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elseif currentPhase == "complete" then
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love.graphics.setColor(0, 1, 0, 1)
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love.graphics.print("Testing Complete!", 20, y)
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y = y + lineHeight
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love.graphics.setColor(1, 1, 1, 1)
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love.graphics.print("Press 'S' to save report", 20, y)
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y = y + lineHeight
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love.graphics.print("Press 'R' to restart", 20, y)
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end
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y = y + lineHeight + 10
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-- Snapshot count
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love.graphics.setColor(0.7, 0.7, 1, 1)
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local snapshots = profiler:getSnapshots()
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love.graphics.print(string.format("Snapshots: %d/%d", #snapshots, #phases), 20, y)
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y = y + lineHeight
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-- Controls
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love.graphics.setColor(0.5, 0.5, 0.5, 1)
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love.graphics.print("S: Save | R: Restart | ESC: Exit", 20, y)
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end
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function profile.keypressed(key)
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if key == "s" then
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if currentPhase == "complete" then
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local success, filepath = profiler:saveReport("ffi_comparison_report")
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if success then
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print("Report saved to: " .. filepath)
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else
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print("Failed to save report: " .. tostring(filepath))
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end
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end
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elseif key == "r" then
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profile.init()
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end
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end
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function profile.resize(w, h)
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FlexLove.resize(w, h)
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end
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function profile.reset()
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-- Clean up old elements
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for _, elem in ipairs(elements) do
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elem:destroy()
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end
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elements = {}
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-- Create new elements
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local container = FlexLove.new({
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width = love.graphics.getWidth(),
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height = love.graphics.getHeight(),
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flexDirection = "horizontal",
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flexWrap = "wrap",
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gap = 5,
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padding = { all = 10 },
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})
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for i = 1, elementCount do
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local hue = (i / elementCount) * 360
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local r, g, b = profile.hsvToRgb(hue, 0.8, 0.9)
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local elem = FlexLove.new({
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parent = container,
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width = 60,
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height = 60,
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backgroundColor = FlexLove.Color.new(r, g, b, 1),
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cornerRadius = { all = 8 },
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text = tostring(i),
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textColor = FlexLove.Color.new(1, 1, 1, 1),
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textAlign = "center",
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textSize = 12,
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})
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table.insert(elements, elem)
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end
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table.insert(elements, container)
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end
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function profile.cleanup()
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for _, elem in ipairs(elements) do
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elem:destroy()
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end
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elements = {}
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FlexLove.destroy()
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end
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-- Helper function to convert HSV to RGB
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function profile.hsvToRgb(h, s, v)
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local c = v * s
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local x = c * (1 - math.abs((h / 60) % 2 - 1))
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local m = v - c
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local r, g, b = 0, 0, 0
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if h < 60 then
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r, g, b = c, x, 0
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elseif h < 120 then
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r, g, b = x, c, 0
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elseif h < 180 then
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r, g, b = 0, c, x
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elseif h < 240 then
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r, g, b = 0, x, c
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elseif h < 300 then
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r, g, b = x, 0, c
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else
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r, g, b = c, 0, x
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end
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return r + m, g + m, b + m
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end
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return profile
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