Add benchmark files and update documentation

Author: Kobzol

collector/compile-benchmarks/README.md

@@ -23,6 +23,8 @@ They mostly consist of real-world crates.
   `N` value from 1 to 1024.
 - **cargo-0.60.0**: The Rust package manager. A large program, and an important
   part of the Rust ecosystem.
+- **cargo-0.87.1**: The Rust package manager. A large program, and an important
+  part of the Rust ecosystem.
 - **clap-3.1.6**: A command line argument parser library. A crate used by many
   Rust programs.
 - **cranelift-codegen-0.82.1**: The largest crate from a code generator. Used by

collector/compile-benchmarks/REUSE.toml

@@ -32,6 +32,11 @@ path = "cargo-0.60.0/**"
 SPDX-FileCopyrightText = "The Rust Project Developers (see https://thanks.rust-lang.org)"
 SPDX-License-Identifier = "MIT OR Apache-2.0"
 
+[[annotations]]
+path = "cargo-0.87.1/**"
+SPDX-FileCopyrightText = "The Rust Project Developers (see https://thanks.rust-lang.org)"
+SPDX-License-Identifier = "MIT OR Apache-2.0"
+
 [[annotations]]
 path = "clap-3.1.6/**"
 SPDX-FileCopyrightText = "clap contributors"

collector/compile-benchmarks/cargo-0.87.1/0-println.patch

@@ -0,0 +1,12 @@
+diff --git a/src/cargo/sources/path.rs b/src/cargo/sources/path.rs
+index c1e81528..7ae91667 100644
+--- a/src/cargo/sources/path.rs
++++ b/src/cargo/sources/path.rs
+@@ -58,6 +58,7 @@ impl<'gctx> PathSource<'gctx> {
+     /// Preloads a package for this source. The source is assumed that it has
+     /// yet loaded any other packages.
+     pub fn preload_with(pkg: Package, gctx: &'gctx GlobalContext) -> Self {
++        println!("testing");
+         let source_id = pkg.package_id().source_id();
+         let path = pkg.root().to_owned();
+         Self {

collector/compile-benchmarks/cargo-0.87.1/Cargo.toml

@@ -393,3 +393,5 @@ rust_2018_idioms = "warn"
 
 [lints.rustdoc]
 private_intra_doc_links = "allow"
+
+[workspace]