diff --git a/Cargo.lock b/Cargo.lock
index 02e7c47..20c8685 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -809,6 +809,15 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "879d54834c8c76457ef4293a689b2a8c59b076067ad77b15efafbb05f92a592b"
 
+[[package]]
+name = "itertools"
+version = "0.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a9a9d19fa1e79b6215ff29b9d6880b706147f16e9b1dbb1e4e5947b5b02bc5e3"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.2"
@@ -1237,6 +1246,7 @@ dependencies = [
  "http-content-range",
  "indicatif",
  "int-enum",
+ "itertools",
  "json",
  "lazy_static",
  "link-cplusplus",
@@ -1245,7 +1255,6 @@ dependencies = [
  "proc_macros",
  "regex",
  "reqwest",
- "spin_on",
  "tokio",
  "url",
  "urlparse",
@@ -1564,15 +1573,6 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 
-[[package]]
-name = "spin_on"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "076e103ed41b9864aa838287efe5f4e3a7a0362dd00671ae62a212e5e4612da2"
-dependencies = [
- "pin-utils",
-]
-
 [[package]]
 name = "static_assertions"
 version = "1.1.0"
diff --git a/Cargo.toml b/Cargo.toml
index c70ad92..9b5e910 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,6 +20,7 @@ http = "0.2"
 http-content-range = "0.1"
 indicatif = "0.17.0-rc.11"
 int-enum = "0.4"
+itertools = "0.10"
 json = "0.12"
 lazy_static = "1.4"
 modular-bitfield = "0.11"
@@ -28,7 +29,6 @@ proc_macros = { path = "proc_macros" }
 regex = "1"
 reqwest = { version = "0.11", features = ["brotli", "deflate", "gzip", "rustls-tls", "socks", "stream"] }
 RustyXML = "0.3"
-spin_on = "0.1.1"
 tokio = { version = "1.19", features = ["rt", "macros", "rt-multi-thread", "time"] }
 url = "2.2"
 urlparse = "0.7"
diff --git a/src/downloader/tasks.rs b/src/downloader/tasks.rs
index 9c57b04..387c051 100644
--- a/src/downloader/tasks.rs
+++ b/src/downloader/tasks.rs
@@ -2,13 +2,14 @@ use super::downloader::DownloaderInternal;
 use super::downloader::GetTargetFileName;
 use super::error::DownloaderError;
 use crate::ext::io::ClearFile;
+use crate::ext::replace::ReplaceWith2;
 use crate::ext::rw_lock::GetRwLock;
 use crate::ext::try_err::TryErr;
 use crate::gettext;
 use futures_util::StreamExt;
 use http_content_range::ContentRange;
+use itertools::partition;
 use reqwest::Response;
-use spin_on::spin_on;
 use std::io::Seek;
 use std::io::SeekFrom;
 use std::io::Write;
@@ -230,35 +231,34 @@ pub async fn check_tasks<
         let mut need_break = false;
         let mut dur = None;
         {
-            let mut tasks = d.tasks.get_mut();
-            tasks.retain_mut(|task| {
-                if task.is_finished() {
-                    let re = spin_on(task).unwrap();
-                    match re {
-                        Ok(_) => {
-                            if !d.is_multi_threads() {
-                                d.set_downloaded();
-                                need_break = true;
-                            }
+            let mut tasks = d.tasks.replace_with2(Vec::new());
+            let mut index = partition(&mut tasks, |s| s.is_finished());
+            while index > 0 {
+                let task = tasks.remove(0);
+                let re = task.await.unwrap();
+                match re {
+                    Ok(_) => {
+                        if !d.is_multi_threads() {
+                            d.set_downloaded();
+                            need_break = true;
                         }
-                        Err(e) => {
-                            println!("{}", e);
-                            if !d.is_multi_threads() {
-                                match d.get_retry_duration() {
-                                    Some(d) => dur = Some(d),
-                                    None => {
-                                        d.set_panic(e);
-                                        need_break = true;
-                                    }
+                    }
+                    Err(e) => {
+                        println!("{}", e);
+                        if !d.is_multi_threads() {
+                            match d.get_retry_duration() {
+                                Some(d) => dur = Some(d),
+                                None => {
+                                    d.set_panic(e);
+                                    need_break = true;
                                 }
                             }
                         }
                     }
-                    false
-                } else {
-                    true
                 }
-            });
+                index -= 1;
+            }
+            d.tasks.replace_with2(tasks);
         }
         if !d.is_multi_threads() && dur.is_some() {
             let dur = dur.unwrap();
diff --git a/src/main.rs b/src/main.rs
index 7590843..645e1ce 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -11,6 +11,7 @@ extern crate http;
 extern crate http_content_range;
 extern crate indicatif;
 extern crate int_enum;
+extern crate itertools;
 extern crate json;
 #[macro_use]
 extern crate lazy_static;