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n-body benchmark: read the inputs from args, as the orignal shoutout code does #1404

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n-body benchmark: read the inputs from args, as the orignal shoutout code does #1404

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21 changes: 6 additions & 15 deletions src/test/bench/shootout-nbody.rs
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Original file line number Diff line number Diff line change
@@ -7,25 +7,16 @@ native mod llvm {
fn sqrt(n: float) -> float;
}

fn main() {
//
// Leave these commented out to
// finish in a reasonable time
// during 'make check' under valgrind
// 5000000
// 50000000
let inputs: [int] = [50000, 500000];
fn main(args: [str]) {
let n = int::from_str(args[1]);

let bodies: [Body::props] = NBodySystem::MakeNBodySystem();

log(debug, NBodySystem::energy(bodies));

for n: int in inputs {
log(debug, NBodySystem::energy(bodies));

let i: int = 0;
while i < n { NBodySystem::advance(bodies, 0.01); i += 1; }
log(debug, NBodySystem::energy(bodies));
}
let i: int = 0;
while i < n { NBodySystem::advance(bodies, 0.01); i += 1; }
log(debug, NBodySystem::energy(bodies));
}

// Body::props is a record of floats, so