add reserve_int

benches/write.rs

@@ -0,0 +1,15 @@
+use bitbuffer::{BitWriteStream, LittleEndian};
+use iai::black_box;
+
+fn write_int_le() {
+    let mut out = Vec::with_capacity(128);
+    {
+        let mut write = BitWriteStream::new(&mut out, LittleEndian);
+        for i in 0..128 {
+            write.write_sized(&black_box(i), 7).unwrap();
+        }
+    }
+    black_box(out);
+}
+
+iai::main!(write_int_le);