feat(compile): show remote modules and metadata size when compiling (#27415)

Co-authored-by: David Sherret <dsherret@gmail.com>

cli/standalone/binary.rs

@@ -1,6 +1,7 @@
 // Copyright 2018-2025 the Deno authors. MIT license.
 
 use std::borrow::Cow;
+use std::cell::Cell;
 use std::collections::HashMap;
 use std::collections::VecDeque;
 use std::env;
@@ -699,7 +700,7 @@ impl<'a> DenoCompileBinaryWriter<'a> {
       vfs_case_sensitivity: vfs.case_sensitivity,
     };
 
-    let data_section_bytes = serialize_binary_data_section(
+    let (data_section_bytes, section_sizes) = serialize_binary_data_section(
       &metadata,
       npm_snapshot.map(|s| s.into_serialized()),
       &specifier_store.for_serialization(&root_dir_url),
@@ -709,6 +710,22 @@ impl<'a> DenoCompileBinaryWriter<'a> {
     )
     .context("Serializing binary data section.")?;
 
+    log::info!(
+      "\n{} {}",
+      crate::colors::bold("Files:"),
+      crate::util::display::human_size(section_sizes.vfs as f64)
+    );
+    log::info!(
+      "{} {}",
+      crate::colors::bold("Metadata:"),
+      crate::util::display::human_size(section_sizes.metadata as f64)
+    );
+    log::info!(
+      "{} {}\n",
+      crate::colors::bold("Remote modules:"),
+      crate::util::display::human_size(section_sizes.remote_modules as f64)
+    );
+
     write_binary_bytes(writer, original_bin, data_section_bytes, compile_flags)
       .context("Writing binary bytes")
   }
@@ -912,6 +929,12 @@ fn write_binary_bytes(
   Ok(())
 }
 
+struct BinaryDataSectionSizes {
+  metadata: usize,
+  remote_modules: usize,
+  vfs: usize,
+}
+
 /// Binary format:
 /// * d3n0l4nd
 /// * <metadata_len><metadata>
@@ -930,12 +953,16 @@ fn serialize_binary_data_section(
   redirects: &SpecifierDataStore<SpecifierId>,
   remote_modules: &SpecifierDataStore<RemoteModuleEntry<'_>>,
   vfs: &BuiltVfs,
-) -> Result<Vec<u8>, AnyError> {
+) -> Result<(Vec<u8>, BinaryDataSectionSizes), AnyError> {
   let metadata = serde_json::to_string(metadata)?;
   let npm_snapshot =
     npm_snapshot.map(serialize_npm_snapshot).unwrap_or_default();
   let serialized_vfs = serde_json::to_string(&vfs.entries)?;
 
+  let remote_modules_len = Cell::new(0);
+  let metadata_len = Cell::new(0);
+  let vfs_len = Cell::new(0);
+
   let bytes = capacity_builder::BytesBuilder::build(|builder| {
     builder.append(MAGIC_BYTES);
     // 1. Metadata
@@ -948,12 +975,14 @@ fn serialize_binary_data_section(
       builder.append_le(npm_snapshot.len() as u64);
       builder.append(&npm_snapshot);
     }
+    metadata_len.set(builder.len());
     // 3. Specifiers
     builder.append(specifiers);
     // 4. Redirects
     redirects.serialize(builder);
     // 5. Remote modules
     remote_modules.serialize(builder);
+    remote_modules_len.set(builder.len() - metadata_len.get());
     // 6. VFS
     {
       builder.append_le(serialized_vfs.len() as u64);
@@ -964,13 +993,21 @@ fn serialize_binary_data_section(
         builder.append(file);
       }
     }
+    vfs_len.set(builder.len() - remote_modules_len.get());
 
     // write the magic bytes at the end so we can use it
     // to make sure we've deserialized correctly
     builder.append(MAGIC_BYTES);
   })?;
 
-  Ok(bytes)
+  Ok((
+    bytes,
+    BinaryDataSectionSizes {
+      metadata: metadata_len.get(),
+      remote_modules: remote_modules_len.get(),
+      vfs: vfs_len.get(),
+    },
+  ))
 }
 
 fn serialize_npm_snapshot(

cli/standalone/virtual_fs.rs

@@ -30,11 +30,7 @@ pub fn output_vfs(vfs: &BuiltVfs, executable_name: &str) {
   let display_tree = vfs_as_display_tree(vfs, executable_name);
   display_tree.print(&mut text).unwrap(); // unwrap ok because it's writing to a string
   log::info!("\n{}\n", deno_terminal::colors::bold("Embedded Files"));
-  log::info!("{}\n", text.trim());
-  log::info!(
-    "Size: {}\n",
-    human_size(vfs.files.iter().map(|f| f.len() as f64).sum())
-  );
+  log::info!("{}", text.trim());
 }
 
 fn vfs_as_display_tree(

tests/specs/compile/case_insensitive_building/compile.out

@@ -6,5 +6,7 @@ main[WILDLINE]
 ├── file.txt ([WILDLINE])
 └── main.js ([WILDLINE])
 
-Size: [WILDLINE]
+Files: [WILDLINE]
+Metadata: [WILDLINE]
+Remote modules: [WILDLINE]
 

tests/specs/compile/env_vars_support/compile.out

@@ -8,5 +8,7 @@ Embedded Files
 out[WILDLINE]
 └── main.ts ([WILDLINE])
 
-Size: [WILDLINE]
+Files: [WILDLINE]
+Metadata: [WILDLINE]
+Remote modules: [WILDLINE]
 

tests/specs/compile/global_npm_cache_implicit_read_permission/compile.out

@@ -45,5 +45,7 @@ main[WILDLINE]
 │   └── yargs-parser/18.1.3/* ([WILDLINE])
 └── main.ts ([WILDLINE])
 
-Size: [WILDLINE]
+Files: [WILDLINE]
+Metadata: [WILDLINE]
+Remote modules: [WILDLINE]
 

tests/specs/compile/include/symlink_twice/compile.out

@@ -7,5 +7,7 @@ main[WILDLINE]
 ├── link.js --> index.js
 └── setup.js ([WILDLINE])
 
-Size: [WILDLINE]
+Files: [WILDLINE]
+Metadata: [WILDLINE]
+Remote modules: [WILDLINE]
 

tests/specs/compile/npm_fs/compile.out

@@ -6,5 +6,7 @@ main[WILDLINE]
 ├── main.ts ([WILDLINE])
 └── node_modules/* ([WILDLINE])
 
-Size: [WILDLINE]
+Files: [WILDLINE]
+Metadata: [WILDLINE]
+Remote modules: [WILDLINE]
 

tests/testdata/compile/node_modules_symlink_outside/main_compile_folder.out

@@ -13,5 +13,7 @@ bin[WILDLINE]
 │   └── node_modules/* ([WILDLINE])
 └── some_folder/* ([WILDLINE])
 
-Size: [WILDLINE]
+Files: [WILDLINE]
+Metadata: [WILDLINE]
+Remote modules: [WILDLINE]