From 7ee0b62ed7f4f4dd371e56bd68b744127a8e7eab Mon Sep 17 00:00:00 2001 From: Dmitry Date: Fri, 7 Oct 2022 16:09:44 +0300 Subject: [PATCH] reader buf 100M => 4K --- bench.txt | 18 +++++++++--------- src/main.rs | 4 ++-- 2 files changed, 11 insertions(+), 11 deletions(-) diff --git a/bench.txt b/bench.txt index 7937a2a..d654114 100644 --- a/bench.txt +++ b/bench.txt @@ -6,18 +6,18 @@ hyperfine -n print -n print2 -n zip-print -w 100 -m 100 ".\target\release\chgk_ledb.exe print 444" ".\target\release\chgk_ledb.exe print2 444" ".\target\release\chgk_ledb.exe zip-print 4 84" Benchmark 1: print - Time (mean ± σ): 17.7 ms ± 2.0 ms [User: 4.3 ms, System: 13.3 ms] - Range (min … max): 15.7 ms … 32.0 ms 100 runs + Time (mean ± σ): 16.9 ms ± 5.0 ms [User: 5.5 ms, System: 13.4 ms] + Range (min … max): 14.5 ms … 65.1 ms 107 runs Benchmark 2: print2 - Time (mean ± σ): 62.2 ms ± 4.3 ms [User: 5.6 ms, System: 53.1 ms] - Range (min … max): 58.1 ms … 94.5 ms 100 runs + Time (mean ± σ): 16.4 ms ± 5.2 ms [User: 4.9 ms, System: 13.2 ms] + Range (min … max): 13.9 ms … 67.5 ms 110 runs Benchmark 3: zip-print - Time (mean ± σ): 37.0 ms ± 6.1 ms [User: 12.0 ms, System: 20.8 ms] - Range (min … max): 32.3 ms … 94.3 ms 100 runs + Time (mean ± σ): 38.3 ms ± 7.4 ms [User: 13.5 ms, System: 22.1 ms] + Range (min … max): 32.8 ms … 91.7 ms 100 runs Summary - 'print' ran - 2.08 ± 0.41 times faster than 'zip-print' - 3.50 ± 0.46 times faster than 'print2' + 'print2' ran + 1.04 ± 0.45 times faster than 'print' + 2.35 ± 0.87 times faster than 'zip-print' diff --git a/src/main.rs b/src/main.rs index 53f7542..24bd221 100644 --- a/src/main.rs +++ b/src/main.rs @@ -238,7 +238,7 @@ fn read_from_db2(id: u32) -> Option { let cfg = bincode::config::standard(); let input = fs::File::open("test.bin").expect("open input"); - let mut input = std::io::BufReader::with_capacity(100 * 1024 * 1024, input); + let mut input = std::io::BufReader::with_capacity(4 * 1024, input); let mut len_data: [u8; LEN_SIZE] = [0; LEN_SIZE]; input.read_exact(&mut len_data).expect("read len"); @@ -273,7 +273,7 @@ fn read_from_db2(id: u32) -> Option { .read_exact(&mut pos_curr_data) .expect("read current pos"); input.read_exact(&mut pos_next_data).expect("read next pos"); - + let data_pos = u32::from_le_bytes(pos_curr_data); let data_pos_next = u32::from_le_bytes(pos_next_data); let data_len = data_pos_next - data_pos;