exporter: Use rayon to export files in parallel

Cargo.lock

@@ -1224,6 +1224,7 @@ dependencies = [
  "image",
  "indicatif",
  "log",
+ "rayon",
  "ruffle_core",
  "ruffle_render_wgpu",
  "walkdir",

exporter/Cargo.toml

@@ -15,6 +15,7 @@ log = "0.4"
 walkdir = "2.3.2"
 indicatif = "0.17"
 anyhow = "1.0"
+rayon = "1.5.3"
 
 [features]
 avm_debug = ["ruffle_core/avm_debug"]

exporter/src/main.rs

@@ -2,6 +2,7 @@ use anyhow::{anyhow, Result};
 use clap::Parser;
 use image::RgbaImage;
 use indicatif::{ProgressBar, ProgressStyle};
+use rayon::prelude::*;
 use ruffle_core::tag_utils::SwfMovie;
 use ruffle_core::PlayerBuilder;
 use ruffle_render_wgpu::clap::{GraphicsBackend, PowerPreference};
@@ -272,7 +273,7 @@ fn capture_multiple_swfs(descriptors: Arc<Descriptors>, opt: &Opt) -> Result<()>
         None
     };
 
-    for file in &files {
+    files.par_iter().try_for_each(|file| -> Result<()> {
         let frames = take_screenshot(
             descriptors.clone(),
             file.path(),
@@ -317,7 +318,9 @@ fn capture_multiple_swfs(descriptors: Arc<Descriptors>, opt: &Opt) -> Result<()>
                 image.save(&destination)?;
             }
         }
-    }
+
+        Ok(())
+    })?;
 
     let message = if opt.frames == 1 {
         format!(