diff options
| -rw-r--r-- | compiler/rustc_metadata/src/rmeta/encoder.rs | 92 |
1 files changed, 69 insertions, 23 deletions
diff --git a/compiler/rustc_metadata/src/rmeta/encoder.rs b/compiler/rustc_metadata/src/rmeta/encoder.rs index 1e83434b9d0..63103061c9c 100644 --- a/compiler/rustc_metadata/src/rmeta/encoder.rs +++ b/compiler/rustc_metadata/src/rmeta/encoder.rs @@ -536,9 +536,11 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> { fn encode_crate_root(&mut self) -> LazyValue<CrateRoot> { let tcx = self.tcx; - let mut i = self.position(); + let mut i = 0; + let preamble_bytes = self.position() - i; // Encode the crate deps + i = self.position(); let crate_deps = self.encode_crate_deps(); let dylib_dependency_formats = self.encode_dylib_dependency_formats(); let dep_bytes = self.position() - i; @@ -564,7 +566,9 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> { let native_libraries = self.encode_native_libraries(); let native_lib_bytes = self.position() - i; + i = self.position(); let foreign_modules = self.encode_foreign_modules(); + let foreign_modules_bytes = self.position() - i; // Encode DefPathTable i = self.position(); @@ -584,6 +588,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> { i = self.position(); let incoherent_impls = self.encode_incoherent_impls(); let incoherent_impls_bytes = self.position() - i; + // Encode MIR. i = self.position(); self.encode_mir(); @@ -596,6 +601,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> { let item_bytes = self.position() - i; // Encode the allocation index + i = self.position(); let interpret_alloc_index = { let mut interpret_alloc_index = Vec::new(); let mut n = 0; @@ -618,6 +624,7 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> { } self.lazy_array(interpret_alloc_index) }; + let interpret_alloc_index_bytes = self.position() - i; // Encode the proc macro data. This affects 'tables', // so we need to do this before we encode the tables @@ -662,9 +669,9 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> { let source_map = self.encode_source_map(); let source_map_bytes = self.position() - i; + i = self.position(); let attrs = tcx.hir().krate_attrs(); let has_default_lib_allocator = tcx.sess.contains_name(&attrs, sym::default_lib_allocator); - let root = self.lazy(CrateRoot { name: tcx.crate_name(LOCAL_CRATE), extra_filename: tcx.sess.opts.cg.extra_filename.clone(), @@ -707,9 +714,34 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> { expn_hashes, def_path_hash_map, }); + let final_bytes = self.position() - i; let total_bytes = self.position(); + let computed_total_bytes = preamble_bytes + + dep_bytes + + lib_feature_bytes + + lang_item_bytes + + diagnostic_item_bytes + + native_lib_bytes + + foreign_modules_bytes + + def_path_table_bytes + + traits_bytes + + impls_bytes + + incoherent_impls_bytes + + mir_bytes + + item_bytes + + interpret_alloc_index_bytes + + proc_macro_data_bytes + + tables_bytes + + debugger_visualizers_bytes + + exported_symbols_bytes + + hygiene_bytes + + def_path_hash_map_bytes + + source_map_bytes + + final_bytes; + assert_eq!(total_bytes, computed_total_bytes); + if tcx.sess.meta_stats() { let mut zero_bytes = 0; for e in self.opaque.data.iter() { @@ -718,27 +750,41 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> { } } - eprintln!("metadata stats:"); - eprintln!(" dep bytes: {}", dep_bytes); - eprintln!(" lib feature bytes: {}", lib_feature_bytes); - eprintln!(" lang item bytes: {}", lang_item_bytes); - eprintln!(" diagnostic item bytes: {}", diagnostic_item_bytes); - eprintln!(" native bytes: {}", native_lib_bytes); - eprintln!(" debugger visualizers bytes: {}", debugger_visualizers_bytes); - eprintln!(" source_map bytes: {}", source_map_bytes); - eprintln!(" traits bytes: {}", traits_bytes); - eprintln!(" impls bytes: {}", impls_bytes); - eprintln!(" incoherent_impls bytes: {}", incoherent_impls_bytes); - eprintln!(" exp. symbols bytes: {}", exported_symbols_bytes); - eprintln!(" def-path table bytes: {}", def_path_table_bytes); - eprintln!(" def-path hashes bytes: {}", def_path_hash_map_bytes); - eprintln!(" proc-macro-data-bytes: {}", proc_macro_data_bytes); - eprintln!(" mir bytes: {}", mir_bytes); - eprintln!(" item bytes: {}", item_bytes); - eprintln!(" table bytes: {}", tables_bytes); - eprintln!(" hygiene bytes: {}", hygiene_bytes); - eprintln!(" zero bytes: {}", zero_bytes); - eprintln!(" total bytes: {}", total_bytes); + let perc = |bytes| (bytes * 100) as f64 / total_bytes as f64; + let p = |label, bytes| { + eprintln!("{:>21}: {:>8} bytes ({:4.1}%)", label, bytes, perc(bytes)); + }; + + eprintln!(""); + eprintln!( + "{} metadata bytes, of which {} bytes ({:.1}%) are zero", + total_bytes, + zero_bytes, + perc(zero_bytes) + ); + p("preamble", preamble_bytes); + p("dep", dep_bytes); + p("lib feature", lib_feature_bytes); + p("lang item", lang_item_bytes); + p("diagnostic item", diagnostic_item_bytes); + p("native lib", native_lib_bytes); + p("foreign modules", foreign_modules_bytes); + p("def-path table", def_path_table_bytes); + p("traits", traits_bytes); + p("impls", impls_bytes); + p("incoherent_impls", incoherent_impls_bytes); + p("mir", mir_bytes); + p("item", item_bytes); + p("interpret_alloc_index", interpret_alloc_index_bytes); + p("proc-macro-data", proc_macro_data_bytes); + p("tables", tables_bytes); + p("debugger visualizers", debugger_visualizers_bytes); + p("exported symbols", exported_symbols_bytes); + p("hygiene", hygiene_bytes); + p("def-path hashes", def_path_hash_map_bytes); + p("source_map", source_map_bytes); + p("final", final_bytes); + eprintln!(""); } root |