diff --git a/Cargo.lock b/Cargo.lock
index 67bc056297e1bf..c26ef2d1f71bcb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7614,6 +7614,7 @@ dependencies = [
  "solana-runtime",
  "solana-sdk",
  "solana-unified-scheduler-logic",
+ "vec_extract_if_polyfill",
 ]
 
 [[package]]
@@ -8984,6 +8985,12 @@ version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
 
+[[package]]
+name = "vec_extract_if_polyfill"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40c9cb5fb67c2692310b6eb3fce7dd4b6e4c9a75be4f2f46b27f0b2b7799759c"
+
 [[package]]
 name = "vec_map"
 version = "0.8.2"
diff --git a/Cargo.toml b/Cargo.toml
index 9f749422730117..c131bbc972335a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -438,6 +438,7 @@ trees = "0.4.2"
 tungstenite = "0.20.1"
 uriparse = "0.6.4"
 url = "2.5.0"
+vec_extract_if_polyfill = "0.1.0"
 wasm-bindgen = "0.2"
 winapi = "0.3.8"
 winreg = "0.50"
diff --git a/programs/sbf/Cargo.lock b/programs/sbf/Cargo.lock
index 7f7f33a445ac2b..9e2178df2d13ca 100644
--- a/programs/sbf/Cargo.lock
+++ b/programs/sbf/Cargo.lock
@@ -6500,6 +6500,7 @@ dependencies = [
  "solana-runtime",
  "solana-sdk",
  "solana-unified-scheduler-logic",
+ "vec_extract_if_polyfill",
 ]
 
 [[package]]
@@ -7698,6 +7699,12 @@ version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
 
+[[package]]
+name = "vec_extract_if_polyfill"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40c9cb5fb67c2692310b6eb3fce7dd4b6e4c9a75be4f2f46b27f0b2b7799759c"
+
 [[package]]
 name = "vec_map"
 version = "0.8.2"
diff --git a/unified-scheduler-pool/Cargo.toml b/unified-scheduler-pool/Cargo.toml
index 69bf63e2be3806..6a46a32b271eac 100644
--- a/unified-scheduler-pool/Cargo.toml
+++ b/unified-scheduler-pool/Cargo.toml
@@ -21,6 +21,7 @@ solana-program-runtime = { workspace = true }
 solana-runtime = { workspace = true }
 solana-sdk = { workspace = true }
 solana-unified-scheduler-logic = { workspace = true }
+vec_extract_if_polyfill = { workspace = true }
 
 [dev-dependencies]
 assert_matches = { workspace = true }
diff --git a/unified-scheduler-pool/src/lib.rs b/unified-scheduler-pool/src/lib.rs
index ec59259c58bfd7..870e137c592224 100644
--- a/unified-scheduler-pool/src/lib.rs
+++ b/unified-scheduler-pool/src/lib.rs
@@ -51,6 +51,7 @@ use {
         thread::{self, sleep, JoinHandle},
         time::{Duration, Instant},
     },
+    vec_extract_if_polyfill::MakeExtractIf,
 };
 
 mod sleepless_testing;
@@ -171,29 +172,22 @@ where
                 };
 
                 let idle_inner_count = {
-                    let Ok(mut scheduler_inners) = scheduler_pool.scheduler_inners.lock() else {
-                        break;
-                    };
-                    let mut inners = mem::take(&mut *scheduler_inners);
-                    drop(scheduler_inners);
-
                     let now = Instant::now();
-                    let old_inner_count = inners.len();
-                    // retain could take long time because it's dropping schedulers!
-                    inners.retain(|(_inner, pooled_at)| {
-                        now.duration_since(*pooled_at) <= max_pooling_duration
-                    });
-                    let new_inner_count = inners.len();
-
                     let Ok(mut scheduler_inners) = scheduler_pool.scheduler_inners.lock() else {
                         break;
                     };
-                    scheduler_inners.extend(inners);
+                    // I want to use the fancy ::extract_if() no matter what....
+                    #[allow(unstable_name_collisions)]
+                    let idle_inners = scheduler_inners
+                        .extract_if(|(_inner, pooled_at)| {
+                            now.duration_since(*pooled_at) > max_pooling_duration
+                        })
+                        .collect::<Vec<_>>();
                     drop(scheduler_inners);
 
-                    old_inner_count
-                        .checked_sub(new_inner_count)
-                        .expect("new_inner_count isn't larger")
+                    let idle_inner_count = idle_inners.len();
+                    drop(idle_inners);
+                    idle_inner_count
                 };
 
                 let trashed_inner_count = {