Struct Vu 

pub struct Vu {
    pub request_config: Arc<RequestConfig>,
    pub plain_headers: Arc<Vec<(String, String)>>,
    pub template: Option<Arc<Template>>,
    pub cancellation_token: CancellationToken,
    pub result_tx: UnboundedSender<RequestRecord>,
    pub budget: Option<Arc<AtomicUsize>>,
}

A virtual user. Owns its configuration and drives its own execution loop.

Call spawn to launch the VU as a Tokio task. The VU loops, making requests as fast as it can until its budget is exhausted (fixed mode) or its cancellation token fires (curve mode).

Fields

request_config: Arc<RequestConfig>

plain_headers: Arc<Vec<(String, String)>>

Pre-converted header pairs shared across all VUs — avoids per-request allocation.

template: Option<Arc<Template>>

cancellation_token: CancellationToken

result_tx: UnboundedSender<RequestRecord>

budget: Option<Arc<AtomicUsize>>

Optional request budget shared across all VUs in fixed-count mode.

Each VU atomically claims one unit before dispatching a request and stops when the counter reaches zero. None means run until the cancellation token is triggered (curve mode).

Implementations

impl Vu

pub fn spawn(self) -> JoinHandle<()>

Consumes the VU and spawns it as a Tokio task.