Migrate to structured logging

src/lang.rs

@@ -22,6 +22,7 @@ use std::num::ParseIntError;
 use std::str::FromStr;
 use std::sync::Arc;
 use std::time::Instant;
+use log::info;
 
 const MAX_HISTORY_LEN: usize = 20;
 const MAX_HISTORY_LEN_PART: f32 = 0.33;
@@ -661,7 +662,7 @@ impl DeckSettings {
         let time = Instant::now();
         let engine = Engine::new();
         let ast = engine.compile(&self.filter);
-        println!("Compile time is {:?}", time.elapsed());
+        info!("Compile time is {:?}", time.elapsed());
         ast.is_ok()
     }
     pub fn get_word_list(&self, state: &AppState) -> Vec<usize> {
@@ -705,7 +706,7 @@ impl DeckSettings {
                 .map(|(index, _)| index)
                 .collect();
 
-            println!("Collecting available words is {:?}", time.elapsed());
+            info!("Collecting available words is {:?}", time.elapsed());
 
             list
         } else {