profiling script

Gemfile

@@ -26,3 +26,7 @@ group :test do
     gem 'liquid-c', github: 'Shopify/liquid-c', ref: 'main'
   end
 end
+
+gem "vernier", "~> 1.0"
+
+gem "debug", "~> 1.9"

Gemfile.lock

@@ -16,6 +16,13 @@ GEM
   specs:
     ast (2.4.2)
     benchmark-ips (2.13.0)
+    debug (1.9.2)
+      irb (~> 1.10)
+      reline (>= 0.3.8)
+    io-console (0.7.2)
+    irb (1.13.1)
+      rdoc (>= 4.0.0)
+      reline (>= 0.4.2)
     json (2.7.2)
     language_server-protocol (3.17.0.3)
     memory_profiler (1.0.1)
@@ -24,10 +31,16 @@ GEM
     parser (3.3.0.5)
       ast (~> 2.4.1)
       racc
+    psych (5.1.2)
+      stringio
     racc (1.7.3)
     rainbow (3.1.1)
     rake (13.2.1)
+    rdoc (6.7.0)
+      psych (>= 4.0.0)
     regexp_parser (2.9.0)
+    reline (0.5.8)
+      io-console (~> 0.5)
     rexml (3.2.6)
     rubocop (1.61.0)
       json (~> 2.3)
@@ -49,15 +62,18 @@ GEM
       rubocop (~> 1.44)
     ruby-progressbar (1.13.0)
     stackprof (0.2.26)
+    stringio (3.1.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     unicode-display_width (2.5.0)
+    vernier (1.0.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   benchmark-ips
+  debug (~> 1.9)
   liquid!
   liquid-c!
   memory_profiler
@@ -68,6 +84,7 @@ DEPENDENCIES
   rubocop-shopify (~> 2.12.0)
   stackprof
   terminal-table
+  vernier (~> 1.0)
 
 BUNDLED WITH
    2.5.7

example/liquid2profile

@@ -29,7 +29,7 @@ optparse = OptionParser.new do |opts|
   opts.on("--db [DB]", "use the provided db file instead of the default") do |db|
     options[:db] = db
   end
-  opts.on("--n-runs [N]", "number of runs") do |n|
+  opts.on("-n [N]", "number of runs") do |n|
     options[:n_runs] = n.to_i
   end
   opts.on("--skip-samply-run", "skip running samply") do
@@ -55,8 +55,6 @@ if options[:samply_run] && !options[:vernier]
       "record",
       "--output",
       samply_output,
-      "bundle",
-      "exec",
       "ruby",
       "--yjit",
       "--yjit-perf",

lib/liquid.rb

@@ -49,6 +49,7 @@ module Liquid
   self.cache_classes = true
 end
 
+require "debug"
 require "liquid/version"
 require 'liquid/parse_tree_visitor'
 require 'liquid/lexer'

product.liquid

@@ -0,0 +1,34 @@
+<div id="product-left">
+  {% for image in product.images %}<div id="product-image">
+    <a href="{{ image | product_img_url: 'large' }}" rel="lightbox[images]" title="{{ product.title | escape }}"><img src="{{ image | product_img_url: 'medium' }}" alt="{{ product.title | escape }}" /></a>
+  </div>
+  {% endfor %}
+</div>
+<div id="product-right">
+  <h1>{{ product.title }}</h1>
+  {{ product.description }}
+
+  {% if product.available %}
+  <form action="/cart/add" method="post">
+
+    <div id="product-variants">
+      <div id="price-field"></div>
+
+      <select id="product-select" name='id'>
+        {% for variant in product.variants %}
+          <option value="{{ variant.id }}">{{ variant.title }} - {{ variant.price | money }}</option>
+        {% endfor %}
+      </select>
+    </div>
+
+    <input type="image" src="purchase.png" name="add" value="Purchase" id="purchase" />
+  </form>
+  {% else %}
+    <p class="bold-red">This product is temporarily unavailable</p>
+  {% endif %}
+
+  <div id="product-details">
+    <strong>Continue Shopping</strong><br />
+    Browse more {{ product.type }} or additional {{ product.vendor }} products.
+  </div>
+</div>