diff --git a/crates/loro-core/examples/encoding.rs b/crates/loro-core/examples/encoding.rs
index feec667d..75193610 100644
--- a/crates/loro-core/examples/encoding.rs
+++ b/crates/loro-core/examples/encoding.rs
@@ -1,6 +1,9 @@
-use std::{io::Read, time::Instant};
+use std::{
+    io::{Read, Write},
+    time::Instant,
+};
 
-use flate2::read::GzDecoder;
+use flate2::{read::GzDecoder, write::GzEncoder};
 use loro_core::{configure::Configure, container::registry::ContainerWrapper, LoroCore};
 use serde_json::Value;
 const RAW_DATA: &[u8; 901823] = include_bytes!("../benches/automerge-paper.json.gz");
@@ -47,20 +50,10 @@ fn main() {
     assert_eq!(buf, buf2);
     let json2 = loro.to_json();
     assert_eq!(json1, json2);
-    let mut last = 100;
-    let mut count = 0;
-    let mut max_count = 0;
-    for &byte in buf.iter() {
-        if byte == last {
-            count += 1;
-            if count > max_count {
-                max_count = count;
-            }
-        } else {
-            count = 0;
-        }
-        last = byte;
-    }
-
-    println!("Longest continuous bytes length {}", max_count);
+    let update_buf = loro.export_updates(&Default::default()).unwrap();
+    println!("Updates have {} bytes", update_buf.len());
+    let mut encoder = GzEncoder::new(Vec::new(), flate2::Compression::default());
+    encoder.write_all(&update_buf).unwrap();
+    let data = encoder.finish().unwrap();
+    println!("After compress updates have {} bytes", data.len());
 }
diff --git a/crates/loro-core/src/log_store.rs b/crates/loro-core/src/log_store.rs
index 1ab88fab..d5818b15 100644
--- a/crates/loro-core/src/log_store.rs
+++ b/crates/loro-core/src/log_store.rs
@@ -45,7 +45,7 @@ pub struct GcConfig {
 impl Default for GcConfig {
     fn default() -> Self {
         GcConfig {
-            gc: true,
+            gc: false,
             snapshot_interval: 6 * MONTH,
         }
     }