fix total size calculation

__tests__/__fixtures__/issues/issue-90/esbuild.mjs

@@ -0,0 +1,27 @@
+import { writeFileSync } from "node:fs";
+import { build } from "esbuild";
+import metaUrlPlugin from '@chialab/esbuild-plugin-meta-url';
+
+const result = await build({
+	entryPoints: [
+		`./src/no-change.ts`,
+		`./src/bit-increased.ts`,
+		`./src/much-increased.ts`,
+		`./src/decreased.ts`,
+		`./src/new-outfile.ts`,
+		`./src/file-imported.ts`,
+	],
+	outdir: `out`,
+	format: "esm",
+	metafile: true,
+	mainFields: ["module", "main"],
+	platform: "node",
+	target: "node20.9",
+	bundle: true,
+	plugins: [
+		metaUrlPlugin(),
+	],
+	sourcemap: true,
+});
+
+writeFileSync(`out/meta.json`, JSON.stringify(result.metafile, null, 2));