diff --git a/rust-brainwallet-search/src/lib.rs b/rust-brainwallet-search/src/lib.rs
index d902082..bf96a77 100644
--- a/rust-brainwallet-search/src/lib.rs
+++ b/rust-brainwallet-search/src/lib.rs
@@ -84,7 +84,6 @@ pub fn brainwallet_sha256_check_btc(
     hashing_rounds: usize,
     hasher_repetition_count: usize,
 ) {
-
     if hashing_rounds == 0 {
         panic!("Invalid number of hashing rounds");
     }
@@ -105,15 +104,17 @@ pub fn brainwallet_sha256_check_btc(
     // minor performance tuning: use larger buffer size then default 8KiB
     const BUF_READER_CAPACITY: usize = 1_048_576; // 1MiB
 
+    let source_id = "brainwallet-sha256";
     // silently drop any problematic lines
     // TODO replace with a mode that flags problematic inputs and keeps statistics on them
-    let passphrases: Vec<String> = BufReader::with_capacity(BUF_READER_CAPACITY, file)
+    //
+    // This distributes inputs on the fly to the parallel runners,
+    // avoiding the need to load the initial input file completely into memory first
+    BufReader::with_capacity(BUF_READER_CAPACITY, file)
         .lines()
+        .par_bridge()
         .filter_map(|l| l.ok())
-        .collect();
-    let source_id = "brainwallet-sha256";
-
-    passphrases.par_iter().for_each(|passphrase| {
+        .for_each(|passphrase| {
         // Count lines and print progress
         c.count_and_print_regularly();