3 files changed, 160 insertions, 0 deletions
diff --git a/third_party/rust/fluent-syntax/benches/contexts/README.md b/third_party/rust/fluent-syntax/benches/contexts/README.md
new file mode 100644
index 0000000000..7d37ac0fe5
--- /dev/null
+++ b/third_party/rust/fluent-syntax/benches/contexts/README.md
@@ -0,0 +1,4 @@
+The following context is extracted from
+the `browser.xhtml` localization context
+from mozilla-central rev 51efc4b931f7
+from 2020-03-03.
diff --git a/third_party/rust/fluent-syntax/benches/parser.rs b/third_party/rust/fluent-syntax/benches/parser.rs
new file mode 100644
index 0000000000..f14725a512
--- /dev/null
+++ b/third_party/rust/fluent-syntax/benches/parser.rs
@@ -0,0 +1,141 @@
+use criterion::criterion_group;
+use criterion::criterion_main;
+use criterion::Criterion;
+use std::collections::HashMap;
+use std::fs;
+use std::io;
+
+use fluent_syntax::parser::parse_runtime;
+
+fn read_file(path: &str) -> Result<String, io::Error> {
+    fs::read_to_string(path)
+}
+
+#[cfg(feature = "all-benchmarks")]
+fn get_resources(tests: &[&'static str]) -> HashMap<&'static str, String> {
+    let mut ftl_strings = HashMap::new();
+    for test in tests {
+        let path = format!("./benches/{}", test);
+        ftl_strings.insert(*test, read_file(&path).expect("Couldn't load file"));
+    }
+    return ftl_strings;
+}
+
+fn get_ctxs(tests: &[&'static str]) -> HashMap<&'static str, Vec<String>> {
+    let mut ftl_strings = HashMap::new();
+    for test in tests {
+        let paths = fs::read_dir(format!("./benches/contexts/{}", test)).unwrap();
+        let strings = paths
+            .into_iter()
+            .map(|p| {
+                let p = p.unwrap().path();
+                let path = p.to_str().unwrap();
+                read_file(path).unwrap()
+            })
+            .collect::<Vec<_>>();
+        ftl_strings.insert(*test, strings);
+    }
+    return ftl_strings;
+}
+
+fn parse_bench(c: &mut Criterion) {
+    #[cfg(feature = "all-benchmarks")]
+    {
+        let tests = &["simple.ftl", "preferences.ftl", "menubar.ftl"];
+
+        let mut group = c.benchmark_group("parse_resource");
+
+        for (name, resource) in get_resources(tests) {
+            group.bench_with_input(name, &resource, |b, source| {
+                b.iter(|| parse_runtime(source.as_str()).expect("Parsing of the FTL failed."))
+            });
+        }
+
+        group.finish();
+    }
+
+    let ctx_names = &["browser", "preferences"];
+
+    #[cfg(feature = "all-benchmarks")]
+    {
+        use fluent_syntax::parser::parse;
+
+        let mut group = c.benchmark_group("parse_ctx");
+
+        for (name, ctx) in get_ctxs(ctx_names) {
+            group.bench_with_input(name, &ctx, |b, ctx| {
+                b.iter(|| {
+                    for source in ctx {
+                        parse(source.as_str()).expect("Parsing of the FTL failed.");
+                    }
+                })
+            });
+        }
+
+        group.finish();
+    }
+
+    {
+        let mut group = c.benchmark_group("parse_ctx_runtime");
+
+        for (name, ctx) in get_ctxs(ctx_names) {
+            group.bench_with_input(name, &ctx, |b, ctx| {
+                b.iter(|| {
+                    for source in ctx {
+                        parse_runtime(source.as_str()).expect("Parsing of the FTL failed.");
+                    }
+                })
+            });
+        }
+
+        group.finish();
+    }
+
+    #[cfg(feature = "all-benchmarks")]
+    {
+        use fluent_syntax::unicode::{unescape_unicode, unescape_unicode_to_string};
+
+        let strings = &[
+            "foo",
+            "This is an example value",
+            "Hello \\u00e3\\u00e9 World",
+            "\\u004c\\u006f\\u0072\\u0065\\u006d \\u0069\\u0070\\u0073\\u0075\\u006d \\u0064\\u006f\\u006c\\u006f\\u0072 \\u0073\\u0069\\u0074 \\u0061\\u006d\\u0065\\u0074",
+            "Let me introduce \\\"The\\\" Fluent",
+            "And here's an example of \\\\ a character to be escaped",
+            "But this message is completely unescape free",
+            "And so is this one",
+            "Maybe this one is as well completely escape free",
+            "Welcome to Mozilla Firefox",
+            "\\u0054\\u0068\\u0065\\u0073\\u0065 \\u0073\\u0065\\u0074\\u0074\\u0069\\u006e\\u0067\\u0073 \\u0061\\u0072\\u0065 \\u0074\\u0061\\u0069\\u006c\\u006f\\u0072\\u0065\\u0064 \\u0074\\u006f \\u0079\\u006f\\u0075\\u0072 \\u0063\\u006f\\u006d\\u0070\\u0075\\u0074\\u0065\\u0072\\u2019\\u0073 \\u0068\\u0061\\u0072\\u0064\\u0077\\u0061\\u0072\\u0065 \\u0061\\u006e\\u0064 \\u006f\\u0070\\u0065\\u0072\\u0061\\u0074\\u0069\\u006e\\u0067 \\u0073\\u0079\\u0073\\u0074\\u0065\\u006d\\u002e",
+            "These settings are tailored to your computer’s hardware and operating system",
+            "Use recommended performance settings",
+            "\\u0041\\u0064\\u0064\\u0069\\u0074\\u0069\\u006f\\u006e\\u0061\\u006c \\u0063\\u006f\\u006e\\u0074\\u0065\\u006e\\u0074 \\u0070\\u0072\\u006f\\u0063\\u0065\\u0073\\u0073\\u0065\\u0073 \\u0063\\u0061\\u006e \\u0069\\u006d\\u0070\\u0072\\u006f\\u0076\\u0065 \\u0070\\u0065\\u0072\\u0066\\u006f\\u0072\\u006d\\u0061\\u006e\\u0063\\u0065 \\u0077\\u0068\\u0065\\u006e \\u0075\\u0073\\u0069\\u006e\\u0067 \\u006d\\u0075\\u006c\\u0074\\u0069\\u0070\\u006c\\u0065 \\u0074\\u0061\\u0062\\u0073\\u002c \\u0062\\u0075\\u0074 \\u0077\\u0069\\u006c\\u006c \\u0061\\u006c\\u0073\\u006f \\u0075\\u0073\\u0065 \\u006d\\u006f\\u0072\\u0065 \\u006d\\u0065\\u006d\\u006f\\u0072\\u0079\\u002e",
+            "Additional content processes can improve performance when using multiple tabs, but will also use more memory.",
+        ];
+
+        let mut group = c.benchmark_group("unicode");
+
+        group.bench_function("writer", |b| {
+            b.iter(|| {
+                let mut result = String::new();
+                for s in strings {
+                    unescape_unicode(&mut result, s).unwrap();
+                    result.clear();
+                }
+            })
+        });
+
+        group.bench_function("to_string", |b| {
+            b.iter(|| {
+                for s in strings {
+                    let _ = unescape_unicode_to_string(s);
+                }
+            })
+        });
+
+        group.finish();
+    }
+}
+
+criterion_group!(benches, parse_bench,);
+criterion_main!(benches);
diff --git a/third_party/rust/fluent-syntax/benches/parser_iai.rs b/third_party/rust/fluent-syntax/benches/parser_iai.rs
new file mode 100644
index 0000000000..f2eed5e5b1
--- /dev/null
+++ b/third_party/rust/fluent-syntax/benches/parser_iai.rs
@@ -0,0 +1,15 @@
+use fluent_syntax::parser::parse_runtime;
+
+fn iai_parse_ctx_runtime() {
+    let files = &[
+        include_str!("contexts/browser/appmenu.ftl"),
+        include_str!("contexts/browser/browser.ftl"),
+        include_str!("contexts/browser/menubar.ftl"),
+        include_str!("contexts/preferences/preferences.ftl"),
+    ];
+    for source in files {
+        parse_runtime(*source).expect("Parsing of the FTL failed.");
+    }
+}
+
+iai::main!(iai_parse_ctx_runtime);