Function init 

pub fn init()

Eagerly initializes CPC’s global decompression tables, used during serialization/deserialization.

Upstream lazily self-initializes these tables on first use via a function-local static with a dynamic initializer; C++11 onward guarantees this lazy path is initialized exactly once even under concurrent access (concurrent callers block until the first caller finishes, they don’t race), so there is no correctness hazard from skipping init(). Calling it eagerly is a latency optimization: it moves the one-time cost of allocating and building the tables off the hot path, and avoids every thread that happens to hit the lazy path first stalling behind whichever one wins the initialization race.

Examples found in repository

examples/bench_cpc_update.rs (line 302)

fn main() {
    let (counts, reps) = parse_args();

    // Off the hot path on purpose -- see the module docs.
    init();

    for items in counts {
        println!("lg_k={LG_K} items={items} reps={reps}");
        bench_distinct(items, reps);
        bench_hot(items, reps);
        bench_str(items, reps);
        bench_serde(items, reps);
    }
}