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src/bin/test_chunk_size.rs: avoid compilöer warnings, exit after 1GB

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This commit is contained in:
Dietmar Maurer 2019-02-20 12:05:28 +01:00
parent 1604ec2654
commit 14691fc1f3
1 changed files with 20 additions and 19 deletions
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39
src/bin/test_chunk_size.rs
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@ -14,10 +14,10 @@ struct ChunkWriter {
chunk_count: usize,
M_old: f64,
M_new: f64,
S_old: f64,
S_new: f64,
m_old: f64,
m_new: f64,
s_old: f64,
s_new: f64,
}
impl ChunkWriter {
@ -29,10 +29,10 @@ impl ChunkWriter {
chunk_offset: 0,
chunk_count: 0,
M_old: 0.0,
M_new: 0.0,
S_old: 0.0,
S_new: 0.0,
m_old: 0.0,
m_new: 0.0,
s_old: 0.0,
s_new: 0.0,
}
}
@ -41,25 +41,25 @@ impl ChunkWriter {
self.chunk_count += 1;
if self.chunk_count == 1 {
self.M_old = chunk_size;
self.M_new = chunk_size;
self.S_old = 0.0;
self.m_old = chunk_size;
self.m_new = chunk_size;
self.s_old = 0.0;
} else {
self.M_new = self.M_old + (chunk_size - self.M_old)/(self.chunk_count as f64);
self.S_new = self.S_old +
(chunk_size - self.M_old)*(chunk_size - self.M_new);
self.m_new = self.m_old + (chunk_size - self.m_old)/(self.chunk_count as f64);
self.s_new = self.s_old +
(chunk_size - self.m_old)*(chunk_size - self.m_new);
// set up for next iteration
self.M_old = self.M_new;
self.S_old = self.S_new;
self.m_old = self.m_new;
self.s_old = self.s_new;
}
let variance = if self.chunk_count > 1 {
self.S_new/((self.chunk_count -1)as f64)
self.s_new/((self.chunk_count -1)as f64)
} else { 0.0 };
let std_deviation = variance.sqrt();
let deviation_per = (std_deviation*100.0)/self.M_new;
println!("COUNT {:10} SIZE {:10} MEAN {:10} DEVIATION {:3}%", self.chunk_count, chunk_size, self.M_new as usize, deviation_per as usize);
let deviation_per = (std_deviation*100.0)/self.m_new;
println!("COUNT {:10} SIZE {:10} MEAN {:10} DEVIATION {:3}%", self.chunk_count, chunk_size, self.m_new as usize, deviation_per as usize);
}
}
@ -109,6 +109,7 @@ fn main() -> Result<(), Error> {
writer.write_all(&buffer)?;
if bytes > 1024*1024*1024 { break; }
}
Ok(())