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22 lines
500 B
Rust
22 lines
500 B
Rust
extern crate flame;
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use std::fs::File;
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fn main() {
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let v: Vec<u64> = vec![2; 1000000];
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flame::start("Iterator .collect");
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let mut _z = vec![];
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for _ in 0..1000 {
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_z = v.iter().map(|x| x*x).collect::<Vec<u64>>();
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}
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flame::end("Iterator .collect");
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flame::start("Iterator iterate");
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for _ in 0..1000 {
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v.iter().map(|x| x * x).for_each(drop);
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}
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flame::end("Iterator iterate");
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flame::dump_html(&mut File::create("flame-graph.html").unwrap()).unwrap();
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}
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