chore: optimize regex usage, avoid useless recreation of Regex instan…

…ce. It saves a few seconds in boot (I should really think about a method to save a few minutes, not seconds..)

Cargo.toml

@@ -47,6 +47,7 @@ dotenvy = "0.15.7"
 
 env_logger = "0.11.3"
 log = "0.4.22"
+once_cell = "1.19.0"
 
 [build-dependencies]
 tokio = { version = "1", features = ["macros", "rt-multi-thread", "rt"] }

src/models/creature/creature_metadata/creature_role.rs

@@ -5,6 +5,7 @@ use crate::models::creature::creature_component::creature_spell_caster::Creature
 use crate::models::item::item_metadata::type_enum::WeaponTypeEnum;
 use crate::models::scales_struct::creature_scales::CreatureScales;
 use num_traits::float::FloatConst;
+use once_cell::sync::Lazy;
 use regex::Regex;
 use serde::{Deserialize, Serialize};
 use std::collections::BTreeMap;
@@ -30,6 +31,12 @@ pub enum CreatureRoleEnum {
     SpellCaster,
 }
 
+fn get_dmg_from_regex(raw_str: &str) -> Option<i64> {
+    // It will only initialize it once.
+    static RE: Lazy<Regex> = Lazy::new(|| Regex::new(r"\((\d+)\)").unwrap());
+    RE.captures(raw_str)?.get(1)?.as_str().parse::<i64>().ok()
+}
+
 impl CreatureRoleEnum {
     pub fn to_db_column(&self) -> String {
         match self {
@@ -49,17 +56,16 @@ impl CreatureRoleEnum {
         cr_spells: &CreatureSpellCasterData,
         scales: &CreatureScales,
     ) -> BTreeMap<CreatureRoleEnum, i64> {
-        let dmg_scales_regex = Regex::new(r"\((\d+)\)").unwrap();
         let mut roles = BTreeMap::new();
         roles.insert(
             Self::Brute,
-            is_brute(cr_core, cr_extra, cr_combat, scales, &dmg_scales_regex)
+            is_brute(cr_core, cr_extra, cr_combat, scales)
                 .map(|x| (x * 100.).round() as i64)
                 .unwrap_or(0),
         );
         roles.insert(
             Self::MagicalStriker,
-            is_magical_striker(cr_core, cr_spells, cr_combat, scales, &dmg_scales_regex)
+            is_magical_striker(cr_core, cr_spells, cr_combat, scales)
                 .map(|x| (x * 100.).round() as i64)
                 .unwrap_or(0),
         );
@@ -77,13 +83,13 @@ impl CreatureRoleEnum {
         );
         roles.insert(
             Self::Sniper,
-            is_sniper(cr_core, cr_extra, cr_combat, scales, &dmg_scales_regex)
+            is_sniper(cr_core, cr_extra, cr_combat, scales)
                 .map(|x| (x * 100.).round() as i64)
                 .unwrap_or(0),
         );
         roles.insert(
             Self::Soldier,
-            is_soldier(cr_core, cr_extra, cr_combat, scales, &dmg_scales_regex)
+            is_soldier(cr_core, cr_extra, cr_combat, scales)
                 .map(|x| (x * 100.).round() as i64)
                 .unwrap_or(0),
         );
@@ -106,7 +112,6 @@ fn is_brute(
     cr_extra: &CreatureExtraData,
     cr_combat: &CreatureCombatData,
     scales: &CreatureScales,
-    re: &Regex,
 ) -> Option<f64> {
     let mut score: u16 = 0;
     let lvl = cr_core.level;
@@ -145,18 +150,8 @@ fn is_brute(
     let atk_bonus_scales = scales.strike_bonus_scales.get(&lvl)?;
     let dmg_scales = scales.strike_dmg_scales.get(&lvl)?;
 
-    let scales_extreme_avg = re
-        .captures(dmg_scales.extreme.as_str())?
-        .get(1)?
-        .as_str()
-        .parse::<i64>()
-        .ok()?;
-    let scales_high_avg = re
-        .captures(dmg_scales.high.as_str())?
-        .get(1)?
-        .as_str()
-        .parse::<i64>()
-        .ok()?;
+    let scales_extreme_avg = get_dmg_from_regex(dmg_scales.extreme.as_str())?;
+    let scales_high_avg = get_dmg_from_regex(dmg_scales.high.as_str())?;
     // high attack bonus and high damage OR moderate attack bonus and extreme damage
     let wp_distance = cr_combat
         .weapons
@@ -187,7 +182,6 @@ fn is_sniper(
     cr_extra: &CreatureExtraData,
     cr_combat: &CreatureCombatData,
     scales: &CreatureScales,
-    re: &Regex,
 ) -> Option<f64> {
     let mut score: u16 = 0;
     let lvl = cr_core.level;
@@ -208,12 +202,7 @@ fn is_sniper(
     // moderate to low HP; skipped
     let atk_bonus_scales = scales.strike_bonus_scales.get(&lvl)?;
     let dmg_scales = scales.strike_dmg_scales.get(&lvl)?;
-    let scales_mod_avg = re
-        .captures(dmg_scales.moderate.as_str())?
-        .get(1)?
-        .as_str()
-        .parse::<i64>()
-        .ok()?;
+    let scales_mod_avg = get_dmg_from_regex(dmg_scales.moderate.as_str())?;
     // ranged Strikes have high attack bonus and damage or
     // moderate attack bonus and extreme damage (melee Strikes are weaker)
     let wp_distance = cr_combat
@@ -268,7 +257,6 @@ pub fn is_soldier(
     cr_extra: &CreatureExtraData,
     cr_combat: &CreatureCombatData,
     scales: &CreatureScales,
-    re: &Regex,
 ) -> Option<f64> {
     let mut score: u16 = 0;
     let lvl = cr_core.level;
@@ -283,14 +271,8 @@ pub fn is_soldier(
     score += calculate_lb_distance(saving_scales.high, cr_combat.saving_throws.fortitude);
     let atk_bonus_scales = scales.strike_bonus_scales.get(&lvl)?;
     let dmg_scales = scales.strike_dmg_scales.get(&lvl)?;
-    let scales_high_avg = re
-        .captures(dmg_scales.high.as_str())?
-        .get(1)?
-        .as_str()
-        .parse::<i64>()
-        .ok()?;
+    let scales_high_avg = get_dmg_from_regex(dmg_scales.high.as_str())?;
     // high attack bonus and high damage;
-
     let wp_distance = cr_combat
         .weapons
         .iter()
@@ -326,18 +308,12 @@ pub fn is_magical_striker(
     cr_spell: &CreatureSpellCasterData,
     cr_combat: &CreatureCombatData,
     scales: &CreatureScales,
-    re: &Regex,
 ) -> Option<f64> {
     let mut score: u16 = 0;
     let lvl = cr_core.level;
     let atk_bonus_scales = scales.strike_bonus_scales.get(&lvl)?;
     let dmg_scales = scales.strike_dmg_scales.get(&lvl)?;
-    let scales_high_avg = re
-        .captures(dmg_scales.high.as_str())?
-        .get(1)?
-        .as_str()
-        .parse::<i64>()
-        .ok()?;
+    let scales_high_avg = get_dmg_from_regex(dmg_scales.high.as_str())?;
     // high attack bonus and high damage;
     let wp_distance = cr_combat
         .weapons