use drawRect instead of putimagedata for units (25% cpu usage reduction)

src/core/configuration/DevConfig.ts

@@ -5,7 +5,7 @@ export const devConfig = new class extends DefaultConfig {
     unitInfo(type: UnitType): UnitInfo {
         const info = super.unitInfo(type)
         const oldCost = info.cost
-        info.cost = (p: Player) => oldCost(p) / 10000
+        info.cost = (p: Player) => 0 * oldCost(p) / 10000
         return info
     }
 
@@ -13,7 +13,7 @@ export const devConfig = new class extends DefaultConfig {
         return 95
     }
     numSpawnPhaseTurns(): number {
-        return 80
+        return 40
     }
     gameCreationRate(): number {
         return 20 * 1000