feat: API for manual performance monitoring (NATIVE-309) (#395)

Author: Swatinem

sentry-core/Cargo.toml

@@ -39,7 +39,7 @@ log_ = { package = "log", version = "0.4.8", optional = true, features = ["std"]
 # Because we re-export all the public API in `sentry`, we actually run all the
 # doctests using the `sentry` crate. This also takes care of the doctest
 # limitation documented in https://github.com/rust-lang/rust/issues/45599.
-sentry = { path = "../sentry", default-features = false, features = ["test"] }
+sentry = { path = "../sentry", default-features = false, features = ["test", "transport"] }
 thiserror = "1.0.15"
 anyhow = "1.0.30"
 tokio = { version = "1.0", features = ["rt", "rt-multi-thread", "macros"] }

sentry-core/src/lib.rs

@@ -63,6 +63,7 @@ mod futures;
 mod hub;
 mod integration;
 mod intodsn;
+mod performance;
 mod scope;
 mod transport;
 
@@ -75,6 +76,7 @@ pub use crate::futures::{SentryFuture, SentryFutureExt};
 pub use crate::hub::Hub;
 pub use crate::integration::Integration;
 pub use crate::intodsn::IntoDsn;
+pub use crate::performance::*;
 pub use crate::scope::{Scope, ScopeGuard};
 pub use crate::transport::{Transport, TransportFactory};