Compare json to json embedded in wasm byte sizes

ComponentsGuide · Jan 15, 2024 · b85226a · b85226a
1 parent 0ed7a53
commit b85226a
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Showing 2 changed files with 26 additions and 16 deletions.
diff --git a/lib/components_guide/wasm/examples/examples_magic_numbers.ex b/lib/components_guide/wasm/examples/examples_magic_numbers.ex
@@ -13,8 +13,26 @@ defmodule ComponentsGuide.Wasm.Examples.MagicNumbers do
       fast_3g_download: 180_000,
       fast_3g_upload: 84_375
     )
+  end
+
+  defmodule MobileThrottlingJSON do
+    use Orb
+
+    Memory.pages(1)
+
+    def json do
+      Jason.encode!(%{
+        slow_3g_latency_ms: 2000,
+        slow_3g_download: 50_000,
+        slow_3g_upload: 50_000,
+        fast_3g_latency_ms: 563,
+        fast_3g_download: 180_000,
+        fast_3g_upload: 84_375
+      })
+    end
 
-    wasm do
+    defw application_json, I32.String do
+      json()
     end
   end
 end
diff --git a/test/components_guide/wasm/examples/magic_numbers_test.exs b/test/components_guide/wasm/examples/magic_numbers_test.exs
@@ -6,29 +6,21 @@ defmodule ComponentsGuide.Wasm.Examples.MagicNumbers.Test do
 
   describe "MobileThrottling" do
     alias MagicNumbers.MobileThrottling
+    alias MagicNumbers.MobileThrottlingJSON
 
-    test "byte size vs json" do
-      assert byte_size(Wasm.to_wasm(MobileThrottling)) == 168
-
-      assert byte_size(
-               Jason.encode!(%{
-                 slow_3g_latency_ms: 2000,
-                 slow_3g_download: 50_000,
-                 slow_3g_upload: 50_000,
-                 fast_3g_latency_ms: 563,
-                 fast_3g_download: 180_000,
-                 fast_3g_upload: 84_375
-               })
-             ) == 149
-    end
+    test "json encoded size", do: assert(149 = byte_size(MobileThrottlingJSON.json()))
+    test "wasm with globals size", do: assert(168 = byte_size(Wasm.to_wasm(MobileThrottling)))
+
+    test "wasm with embedded json size",
+      do: assert(224 = byte_size(Wasm.to_wasm(MobileThrottlingJSON)))
 
     @tag :skip
     test "opt" do
       path_wasm = Path.join(__DIR__, "mobile_throttling.wasm")
       path_wat = Path.join(__DIR__, "mobile_throttling.wat")
       path_opt_wasm = Path.join(__DIR__, "mobile_throttling_OPT.wasm")
       path_opt_wat = Path.join(__DIR__, "mobile_throttling_OPT.wat")
-      wasm = Wasm.to_wasm(MobileThrottling)
+      wasm = Wasm.to_wasm(MobileThrottlingJSON)
       File.write!(path_wasm, wasm)
       System.cmd("wasm-opt", [path_wasm, "-o", path_opt_wasm, "-O"])