Slowdown again

Cargo.lock

@@ -1249,6 +1249,12 @@ version = "0.2.153"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
 
+[[package]]
+name = "libm"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ec2a862134d2a7d32d7983ddcdd1c4923530833c9f2ea1a44fc5fa473989058"
+
 [[package]]
 name = "libredox"
 version = "0.1.3"
@@ -1291,6 +1297,7 @@ dependencies = [
  "openssl",
  "parking_lot",
  "rand",
+ "rand_distr",
  "regex",
  "reqwest",
  "rlimit",
@@ -1655,6 +1662,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "da0df0e5185db44f69b44f26786fe401b6c293d1907744beaa7fa62b2e5a517a"
 dependencies = [
  "autocfg",
+ "libm",
 ]
 
 [[package]]
@@ -1937,6 +1945,16 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "rand_distr"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32cb0b9bc82b0a0876c2dd994a7e7a2683d3e7390ca40e6886785ef0c7e3ee31"
+dependencies = [
+ "num-traits",
+ "rand",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.4.1"

crates/librqbit/Cargo.toml

@@ -71,6 +71,7 @@ bytes = "1.5.0"
 rlimit = "0.10.1"
 async-stream = "0.3.5"
 memmap2 = "0.9.4"
+rand_distr = "0.4.3"
 
 [dev-dependencies]
 futures = { version = "0.3" }

crates/librqbit/src/storage/slow.rs

@@ -1,6 +1,7 @@
 use std::time::Duration;
 
 use rand::Rng;
+use rand_distr::Distribution;
 
 use super::{StorageFactory, TorrentStorage};
 
@@ -30,9 +31,23 @@ pub struct SlowStorage<U> {
     underlying: U,
 }
 
+fn random_duration() -> Duration {
+    use rand_distr::StandardNormal;
+
+    let s = StandardNormal {};
+
+    let sl: f64 = s.sample(&mut rand::thread_rng());
+    // let sl = Duration::from_secs_f64(sl);
+    // tracing::trace!(duration = ?sl, "sleeping");
+    // std::thread::sleep(sl)
+    //
+    let micros = 340f64 + sl * 200.;
+    let micros = micros.max(0.001) * 2.;
+    Duration::from_micros(micros as u64)
+}
+
 fn random_sleep() {
-    let sl = rand::thread_rng().gen_range(0f64..0.1f64);
-    let sl = Duration::from_secs_f64(sl);
+    let sl = random_duration();
     tracing::trace!(duration = ?sl, "sleeping");
     std::thread::sleep(sl)
 }

crates/rqbit/src/main.rs

@@ -8,7 +8,8 @@ use librqbit::{
     http_api::{HttpApi, HttpApiOptions},
     http_api_client, librqbit_spawn,
     storage::{
-        filesystem::FilesystemStorageFactory, timing::TimingStorageFactory, StorageFactoryExt,
+        filesystem::FilesystemStorageFactory, slow::SlowStorageFactory,
+        timing::TimingStorageFactory, StorageFactoryExt,
     },
     tracing_subscriber_config_utils::{init_logging, InitLoggingOptions},
     AddTorrent, AddTorrentOptions, AddTorrentResponse, Api, ListOnlyResponse,
@@ -382,7 +383,7 @@ async fn async_main(opts: Opts) -> anyhow::Result<()> {
                 disable_trackers: download_opts.disable_trackers,
                 storage_factory: Some({
                     let sf = FilesystemStorageFactory::default();
-                    // let sf = SlowStorageFactory::new(sf);
+                    let sf = SlowStorageFactory::new(sf);
                     TimingStorageFactory::new("fs".to_owned(), sf).boxed()
                 }),
                 ..Default::default()