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<Question> {
     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<Question> {
         .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;