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Fast mode for Howl [73] #88

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Fast mode for Howl [73] #88

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e1cc33a
Added fast arg & implementation
Sep 8, 2026
ab7a69e
Formatting
jackbdoughty Sep 8, 2026
009611f
Re-added mut before fbb arg in produce_messages
jackbdoughty Sep 8, 2026
b39447b
Remove mut before fbb arg in produce_messages
jackbdoughty Sep 8, 2026
0777986
use as_slice on ev44 vec
rerpha Sep 8, 2026
c472fbd
Make fast arg less complicated
jackbdoughty Sep 8, 2026
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15 changes: 8 additions & 7 deletions src/howl.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -147,17 +147,17 @@ fn produce_messages(
}
}

let ev44 = generate_fake_events(fbb, rng, frame, conf.event_message_config, now_nanos).to_vec();

for _ in 0..conf.messages_per_frame {
match producer.send(
BaseRecord::to(conf.event_topic)
.key("")
.payload(generate_fake_events(
fbb,
rng,
frame,
conf.event_message_config,
now_nanos,
))
.payload(if conf.fast {
ev44.as_slice()
} else {
generate_fake_events(fbb, rng, frame, conf.event_message_config, now_nanos)
})
.timestamp(now_nanos / 1_000_000),
) {
Ok(_) => {}
Expand Down Expand Up @@ -273,6 +273,7 @@ pub struct HowlConfig<'a> {
pub frames_per_run: u32,
pub veto_probability: f64, // 1 = always vetoed, 0 = never vetoed
pub event_message_config: &'a EventMessageConfig,
pub fast: bool,
pub kafka_config: Option<Vec<KafkaOption>>,
}

Expand Down
5 changes: 5 additions & 0 deletions src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,9 @@ enum Commands {
/// Veto probability (0 = never vetoed; 1 = always vetoed)
#[arg(long, default_value = "0.0")]
veto_probability: f64,
/// Enable howl fast mode (Disables randomised ev44 blob generation)
#[arg(long, action=clap::ArgAction::SetTrue)]
fast: bool,
// Additonal command line arguments
#[arg(short = 'X', long)]
kafka_config: Option<Vec<KafkaOption>>,
Expand Down Expand Up @@ -164,6 +167,7 @@ async fn main() {
det_min,
det_max,
veto_probability,
fast,
kafka_config,
} => howl(&HowlConfig {
kafka_config,
Expand All @@ -181,6 +185,7 @@ async fn main() {
det_max,
},
veto_probability,
fast,
}),
Commands::Count {
topic,
Expand Down
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