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|
//! Benchmarks for `ComposerRepository::load_packages` against a v2 (metadata-url) repository.
//!
//! The responses are real packagist p2 files served through the HTTP downloader mock, so one
//! iteration covers what `composer update` does per package: decode the response, expand the
//! minified metadata, filter by constraint and stability, and build the accepted packages. The
//! constraint decides how many versions survive that filter, which is what the lazy expansion is
//! meant to exploit.
use criterion::BatchSize;
use criterion::BenchmarkId;
use criterion::Criterion;
use criterion::criterion_group;
use criterion::criterion_main;
use indexmap::IndexMap;
use shirabe::config::Config;
use shirabe::io::IOInterface;
use shirabe::io::null_io::NullIO;
use shirabe::json::json_file::JsonFile;
use shirabe::package::base_package::STABILITY_STABLE;
use shirabe::package::version::VersionParser;
use shirabe::repository::composer_repository::ComposerRepository;
use shirabe::util::http_downloader::{
HttpDownloader, HttpDownloaderMockExpectation, HttpDownloaderMockHandler,
};
use shirabe_php_shim::PhpMixed;
use shirabe_semver::constraint::AnyConstraint;
use tempfile::TempDir;
#[path = "packagist_fixture.rs"]
mod packagist_fixture;
const PACKAGES: &[&str] = &["symfony/console", "laravel/framework"];
/// Constraints spanning the acceptance rates a repository sees, from one no version satisfies to
/// one that takes every version there is. Each case is labelled with how many packages survived,
/// since that rate is what decides whether deferring the copy pays off.
const CONSTRAINTS: &[(&str, &str)] = &[
("none", "^99.0"),
("major7", "^7.0"),
("major6-up", ">=6.0"),
("major4-up", ">=4.0"),
("major2-up", ">=2.0"),
("any", "*"),
];
const REPOSITORY_URL: &str = "https://example.org/packages.json";
const METADATA_URL: &str = "https://example.org/p2/%package%.json";
/// A root file with nothing but a metadata-url, which is what puts the repository on the lazy
/// provider path `load_async_packages` serves.
fn root_file() -> String {
let mut root: IndexMap<String, PhpMixed> = IndexMap::new();
root.insert("packages".to_string(), PhpMixed::Array(IndexMap::new()));
root.insert(
"metadata-url".to_string(),
PhpMixed::String(METADATA_URL.to_string()),
);
JsonFile::encode(&PhpMixed::Array(root)).expect("failed to encode the root file")
}
/// A config whose cache is read-only, so the measurement stays off the filesystem.
fn config(home: &TempDir) -> Config {
let mut config = Config::new(true, None);
let mut settings: IndexMap<String, PhpMixed> = IndexMap::new();
settings.insert(
"home".to_string(),
PhpMixed::String(home.path().display().to_string()),
);
settings.insert("cache-read-only".to_string(), PhpMixed::Bool(true));
let mut top: IndexMap<String, PhpMixed> = IndexMap::new();
top.insert("config".to_string(), PhpMixed::Array(settings));
config.merge(&top, Config::SOURCE_UNKNOWN);
config
}
/// A repository answering exactly two requests, in the order `load_packages` makes them: the root
/// file, then the package's metadata.
fn repository(package: &str, root: &str, metadata: &str, config: &Config) -> ComposerRepository {
let expectations = vec![
HttpDownloaderMockExpectation {
url: REPOSITORY_URL.to_string(),
options: None,
status: 200,
body: root.to_string(),
headers: vec![String::new()],
},
HttpDownloaderMockExpectation {
url: METADATA_URL.replace("%package%", package),
options: None,
status: 200,
body: metadata.to_string(),
headers: vec![String::new()],
},
];
let io: std::rc::Rc<std::cell::RefCell<dyn IOInterface>> =
std::rc::Rc::new(std::cell::RefCell::new(NullIO::new()));
let http_downloader = std::rc::Rc::new(std::cell::RefCell::new(HttpDownloader::__new_mock(
io.clone(),
std::rc::Rc::new(std::cell::RefCell::new(Config::new(false, None))),
)));
http_downloader.borrow_mut().__expects(
expectations,
true,
HttpDownloaderMockHandler::default(),
);
let mut repo_config: IndexMap<String, PhpMixed> = IndexMap::new();
repo_config.insert(
"url".to_string(),
PhpMixed::String(REPOSITORY_URL.to_string()),
);
ComposerRepository::new(repo_config, io, config, http_downloader, None)
.expect("failed to build the repository")
}
fn load(
repository: &mut ComposerRepository,
package: &str,
constraint: &AnyConstraint,
acceptable_stabilities: &IndexMap<String, i64>,
) -> usize {
let mut package_name_map: IndexMap<String, Option<AnyConstraint>> = IndexMap::new();
package_name_map.insert(package.to_string(), Some(constraint.clone()));
repository
.load_packages(
package_name_map,
acceptable_stabilities.clone(),
IndexMap::new(),
IndexMap::new(),
)
.expect("load_packages failed")
.packages
.len()
}
/// How many versions the p2 file carries, for the `<loaded>of<total>` labels.
fn version_count(package: &str, metadata: &str) -> usize {
JsonFile::parse_json(Some(metadata), None)
.expect("invalid fixture JSON")
.as_array()
.and_then(|response| response.get("packages"))
.and_then(|v| v.as_array())
.and_then(|packages| packages.get(package))
.and_then(|v| v.as_list())
.expect("the fixture has no version list for the package")
.len()
}
fn bench_load_packages(c: &mut Criterion) {
let home = TempDir::new().expect("failed to create the config home");
let config = config(&home);
let root = root_file();
let version_parser = VersionParser::new();
let mut acceptable_stabilities: IndexMap<String, i64> = IndexMap::new();
acceptable_stabilities.insert("stable".to_string(), STABILITY_STABLE);
for package in PACKAGES {
let metadata = packagist_fixture::fetch(package);
let total = version_count(package, &metadata);
let mut group = c.benchmark_group(format!("load_packages/{package}"));
for (label, constraint) in CONSTRAINTS {
let constraint: AnyConstraint = version_parser
.parse_constraints(constraint)
.expect("failed to parse the constraint");
let mut probe = repository(package, &root, &metadata, &config);
let loaded = load(&mut probe, package, &constraint, &acceptable_stabilities);
let parameter = format!("{label}/{loaded}of{total}");
group.bench_function(BenchmarkId::from_parameter(parameter), |b| {
b.iter_batched(
|| repository(package, &root, &metadata, &config),
|mut repository| {
load(
&mut repository,
package,
&constraint,
&acceptable_stabilities,
)
},
BatchSize::PerIteration,
);
});
}
group.finish();
}
}
criterion_group!(benches, bench_load_packages);
criterion_main!(benches);
|
