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Revert "Add benchmarks for V8 native function calls (#1079)"
This reverts commit 6444cb9d61.
This commit is contained in:
Ryan Dahl
parent
4e08bd7917
commit
df9ea2a54d
2 changed files with 0 additions and 140 deletions
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@ -106,10 +106,5 @@ name = "process"
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name = "build"
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name = "build"
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path = "build.rs"
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path = "build.rs"
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[[bench]]
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name = "function"
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path = "benches/function.rs"
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harness = false
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[workspace]
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[workspace]
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members = ["examples/android"]
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members = ["examples/android"]
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@ -1,135 +0,0 @@
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use std::os::raw::c_void;
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fn main() {
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v8::V8::set_flags_from_string(
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"--turbo_fast_api_calls --allow_natives_syntax",
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);
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let platform = v8::new_default_platform(0, false).make_shared();
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v8::V8::initialize_platform(platform);
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v8::V8::initialize();
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let isolate = &mut v8::Isolate::new(v8::CreateParams::default());
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let handle_scope = &mut v8::HandleScope::new(isolate);
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let context = v8::Context::new(handle_scope);
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let scope = &mut v8::ContextScope::new(handle_scope, context);
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let global = context.global(scope);
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{
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let func = v8::Function::new(
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scope,
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|scope: &mut v8::HandleScope,
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_: v8::FunctionCallbackArguments,
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mut rv: v8::ReturnValue| {
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rv.set(v8::Integer::new(scope, 42).into());
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},
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)
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.unwrap();
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let name = v8::String::new(scope, "new_").unwrap();
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global.set(scope, name.into(), func.into()).unwrap();
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}
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{
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extern "C" fn callback(info: *const v8::FunctionCallbackInfo) {
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let scope = unsafe { &mut v8::CallbackScope::new(&*info) };
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let mut rv =
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unsafe { v8::ReturnValue::from_function_callback_info(info) };
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rv.set(v8::Integer::new(scope, 42).into());
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}
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let func = v8::Function::new_raw(scope, callback).unwrap();
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let name = v8::String::new(scope, "new_raw").unwrap();
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global.set(scope, name.into(), func.into()).unwrap();
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}
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{
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extern "C" fn callback(info: *const v8::FunctionCallbackInfo) {
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let mut rv =
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unsafe { v8::ReturnValue::from_function_callback_info(info) };
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rv.set_uint32(42);
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}
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let func = v8::Function::new_raw(scope, callback).unwrap();
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let name = v8::String::new(scope, "new_raw_set_uint32").unwrap();
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global.set(scope, name.into(), func.into()).unwrap();
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}
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{
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let func = v8::Function::new(
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scope,
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|_: &mut v8::HandleScope,
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_: v8::FunctionCallbackArguments,
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mut rv: v8::ReturnValue| {
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rv.set_uint32(42);
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},
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)
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.unwrap();
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let name = v8::String::new(scope, "new_set_uint32").unwrap();
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global.set(scope, name.into(), func.into()).unwrap();
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}
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{
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fn fast_fn() -> i32 {
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42
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}
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pub struct FastCall;
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impl v8::fast_api::FastFunction for FastCall {
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fn args(&self) -> &'static [v8::fast_api::Type] {
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&[v8::fast_api::Type::V8Value]
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}
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fn return_type(&self) -> v8::fast_api::CType {
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v8::fast_api::CType::Int32
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}
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fn function(&self) -> *const c_void {
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fast_fn as _
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}
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}
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let template = v8::FunctionTemplate::builder(
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|scope: &mut v8::HandleScope,
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_: v8::FunctionCallbackArguments,
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mut rv: v8::ReturnValue| {
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rv.set(v8::Integer::new(scope, 42).into());
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},
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)
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.build_fast(scope, &FastCall, None);
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let name = v8::String::new(scope, "new_fast").unwrap();
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let value = template.get_function(scope).unwrap();
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global.set(scope, name.into(), value.into()).unwrap();
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}
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let runs = 100_000_000;
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for x in [
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"new_",
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"new_raw",
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"new_set_uint32",
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"new_raw_set_uint32",
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"new_fast",
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] {
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let code = format!(
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"
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function bench() {{ return {}(); }};
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runs = {};
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start = Date.now();
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for (i = 0; i < runs; i++) bench();
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Date.now() - start;
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",
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x, runs
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);
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let r = eval(scope, &code).unwrap();
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let number = r.to_number(scope).unwrap();
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let total_ms = number.number_value(scope).unwrap();
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let total_ns = 1e6 * total_ms;
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let ns_per_run = total_ns / (runs as f64);
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let mops_per_sec = (runs as f64) / (total_ms / 1000.0) / 1e6;
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println!(
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"{:.1} ns per run {:.1} million ops/sec → {}",
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ns_per_run, mops_per_sec, x
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);
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}
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}
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fn eval<'s>(
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scope: &mut v8::HandleScope<'s>,
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code: &str,
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) -> Option<v8::Local<'s, v8::Value>> {
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let scope = &mut v8::EscapableHandleScope::new(scope);
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let source = v8::String::new(scope, code).unwrap();
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let script = v8::Script::compile(scope, source, None).unwrap();
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let r = script.run(scope);
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r.map(|v| scope.escape(v))
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}
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