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Editing: microbenchmark.lua

local template = require "resty.template"

local ok, new_tab = pcall(require, "table.new")
if not ok then
    new_tab = function() return {} end
end

local function run(iterations)

local gc, total, print, parse, compile, clock, format = collectgarbage, 0, ngx and ngx.say or print, template.parse,
                                                            template.compile, os.clock, string.format

iterations = iterations or 1000

local view = [[
    <ul>
    {% for _, v in ipairs(context) do %}
        <li>{{v}}</li>
    {% end %}
    </ul>]]

print(format("Running %d iterations in each test", iterations))

gc()
    gc()

local x = clock()
    for _ = 1, iterations do
        parse(view, true)
    end
    local z = clock() - x
    print(format("    Parsing Time: %.6f", z))
    total = total + z

gc()
    gc()

x = clock()
    for _ = 1, iterations do
        compile(view, nil, true)
        template.cache = {}
    end
    z = clock() - x
    print(format("Compilation Time: %.6f (template)", z))
    total = total + z

compile(view, nil, true)

gc()
    gc()

x = clock()
    for _ = 1, iterations do
        compile(view, 1, true)
    end
    z = clock() - x
    print(format("Compilation Time: %.6f (template, cached)", z))
    total = total + z

local context = { "Emma", "James", "Nicholas", "Mary" }

template.cache = {}

gc()
    gc()

x = clock()
    for _ = 1, iterations do
        compile(view, 1, true)(context)
        template.cache = {}
    end
    z = clock() - x
    print(format("  Execution Time: %.6f (same template)", z))
    total = total + z

template.cache = {}
    compile(view, 1, true)

gc()
    gc()

x = clock()
    for _ = 1, iterations do
        compile(view, 1, true)(context)
    end
    z = clock() - x
    print(format("  Execution Time: %.6f (same template, cached)", z))
    total = total + z

template.cache = {}

local views = new_tab(iterations, 0)
    for i = 1, iterations do
        views[i] = "<h1>Iteration " .. i .. "</h1>\n" .. view
    end

gc()
    gc()

x = clock()
    for i = 1, iterations do
        compile(views[i], i, true)(context)
    end
    z = clock() - x
    print(format("  Execution Time: %.6f (different template)", z))
    total = total + z

gc()
    gc()

x = clock()
    for i = 1, iterations do
        compile(views[i], i, true)(context)
    end
    z = clock() - x
    print(format("  Execution Time: %.6f (different template, cached)", z))
    total = total + z

local contexts = new_tab(iterations, 0)

for i = 1, iterations do
        contexts[i] = { "Emma", "James", "Nicholas", "Mary" }
    end

template.cache = {}

gc()
    gc()

x = clock()
    for i = 1, iterations do
        compile(views[i], i, true)(contexts[i])
    end
    z = clock() - x
    print(format("  Execution Time: %.6f (different template, different context)", z))
    total = total + z

gc()
    gc()

x = clock()
    for i = 1, iterations do
        compile(views[i], i, true)(contexts[i])
    end
    z = clock() - x
    print(format("  Execution Time: %.6f (different template, different context, cached)", z))
    total = total + z
    print(format("      Total Time: %.6f", total))
end

return {
    run = run
}

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