It runs but not really

codecs/visdif/Cargo.lock

@@ -281,6 +281,7 @@ dependencies = [
  "console_error_panic_hook",
  "dssim-core",
  "imgref",
+ "rayon-core",
  "rgb",
  "wasm-bindgen",
  "wasm-bindgen-test",

codecs/visdif/Cargo.toml

@@ -18,6 +18,7 @@ wasm-bindgen = "0.2.38"
 dssim-core = "2.11.3"
 imgref = "1.7.0"
 rgb = "0.8.24"
+rayon-core = "1.7.1"
 # The `console_error_panic_hook` crate provides better debugging of panics by
 # logging them with `console.error`. This is great for development, but requires
 # all the `std::fmt` and `std::panicking` infrastructure, so isn't great for

codecs/visdif/src/lib.rs

@@ -4,6 +4,7 @@ use wasm_bindgen::prelude::*;
 use dssim_core::{Dssim, ToRGBAPLU};
 use imgref;
 use rgb::FromSlice;
+use rayon_core;
 
 mod utils;
 
@@ -17,6 +18,7 @@ cfg_if! {
     }
 }
 
+
 #[wasm_bindgen]
 #[no_mangle]
 pub fn ssim(data_a: Vec<u8>, data_b: Vec<u8>, width: usize, height: usize) -> f64 {

codecs/visdif/src/utils.rs

@@ -8,7 +8,7 @@ cfg_if! {
     // For more details see
     // https://github.com/rustwasm/console_error_panic_hook#readme
     if #[cfg(feature = "console_error_panic_hook")] {
-        extern crate console_error_panic_hook;
+        use console_error_panic_hook;
         pub use self::console_error_panic_hook::set_once as set_panic_hook;
     } else {
         #[inline]