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use rusty_v8 as v8;
use std::mem::forget;
fn main() {
let platform = v8::new_default_platform().unwrap();
v8::V8::initialize_platform(platform);
v8::V8::initialize();
let snapshot;
// --- create snapshot ---
{
let mut creator = v8::SnapshotCreator::new(None);
let mut isolate = unsafe { creator.get_owned_isolate() };
{
let scope = &mut v8::HandleScope::new(&mut isolate);
let context = v8::Context::new(scope);
let src = r#"
function add1(n) { return n + 1; }
x = 1;
y = 2;
add1(x + y);
"#;
{
let scope = &mut v8::ContextScope::new(scope, context);
let code = v8::String::new(scope, src).unwrap();
let script = v8::Script::compile(scope, code, None).unwrap();
let result = script.run(scope).unwrap();
assert_eq!(result.to_rust_string_lossy(scope), "4");
}
creator.set_default_context(context);
}
snapshot = creator.create_blob(v8::FunctionCodeHandling::Keep).unwrap();
let snapshot_slice: &[u8] = &*snapshot;
println!("Snapshot size: {} kb", snapshot_slice.len() / 1024);
forget(isolate);
}
// --- restore snapshot ---
{
let mut isolate = v8::Isolate::new(v8::Isolate::create_params().snapshot_blob(snapshot));
let scope = &mut v8::HandleScope::new(&mut isolate);
let context = v8::Context::new(scope);
{
let scope = &mut v8::ContextScope::new(scope, context);
let code = v8::String::new(scope, "add1(x + y)").unwrap();
let script = v8::Script::compile(scope, code, None).unwrap();
let result = script.run(scope).unwrap();
assert_eq!(result.to_rust_string_lossy(scope), "4");
}
}
}
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