Moved input lines on to stack if input is small.

Fortune for genmarkov's current commit: Future small blessing − 末小吉

Cargo.lock

@@ -399,6 +399,7 @@ dependencies = [
  "os_pipe",
  "serde",
  "serde_cbor",
+ "smallvec",
  "tokio",
  "tokio-uring",
  "zstd",
@@ -630,6 +631,15 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "smallvec"
+version = "1.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fcf8323ef1faaee30a44a340193b1ac6814fd9b7b4e88e9d4519a3e4abe1cfd"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "socket2"
 version = "0.4.10"

Cargo.toml

@@ -23,6 +23,7 @@ strip = false
 default = ["threads"]
 
 threads = ["zstd/zstdmt", "dep:num_cpus"]
+unstable = ["smallvec/specialization", "smallvec/may_dangle"]
 #io_uring = ["dep:tokio-uring", "dep:async-compression", "dep:futures", "dep:tokio", "dep:os_pipe"]
 
 [dependencies]
@@ -35,6 +36,7 @@ num_cpus = { version = "1.16.0", optional = true }
 os_pipe = { version = "1.2.1", optional = true }
 serde = { version = "1.0.217", features = ["derive"] }
 serde_cbor = { version = "0.11.2", features = ["alloc"] }
+smallvec = { version = "1.14.0", features = ["union", "const_generics", "const_new", "serde", "write"] }
 tokio = { version = "1.43.0", features = ["io-util"], optional = true }
 tokio-uring = { version = "0.5.0", optional = true, features = ["bytes"] }
 zstd = { version = "0.13.2", features = [] }

src/main.rs

@@ -1,5 +1,6 @@
 //#[macro_use] extern crate serde;
 
+use smallvec::SmallVec;
 use clap::{
     Parser, Subcommand, ValueEnum,
 };
@@ -119,7 +120,7 @@ fn main() {
 	buffered_read_all_lines(&mut stdin, |string| {
             chain.feed(&string.split_whitespace()
                        .filter(|word| !word.is_empty())
-                       .map(|s| s.to_owned()).collect::<Vec<_>>());
+                       .map(|s| s.to_owned()).collect::<SmallVec<[_; 16]>>());
 	    
 	    Ok(())
 	}).expect("Failed to read from stdin");