Speed up timezone detection

teavm-classlib/src/main/java/org/teavm/classlib/impl/tz/DateTimeZoneProvider.java

@@ -131,7 +131,7 @@ public class DateTimeZoneProvider {
 
             if (scoreTable.size() == 1 || scoreTable.get(0).tz.previousTransition(time) == time) {
                 return scoreTable.get(0).tz;
-            } else if (scoreTable.size() > 1 && scoreTable.get(0).value + 48 * 7 < scoreTable.get(1).value) {
+            } else if (scoreTable.size() > 1 && scoreTable.get(0).value + 48 * 60 < scoreTable.get(1).value) {
                 return scoreTable.get(0).tz;
             }
 

teavm-classlib/src/main/java/org/teavm/classlib/java/util/TCalendar.java

@@ -146,6 +146,10 @@ public abstract class TCalendar implements TSerializable, TCloneable, TComparabl
             "DAY_OF_MONTH=", "DAY_OF_YEAR=", "DAY_OF_WEEK=", "DAY_OF_WEEK_IN_MONTH=", "AM_PM=", "HOUR=", "HOUR_OF_DAY",
             "MINUTE=", "SECOND=", "MILLISECOND=", "ZONE_OFFSET=", "DST_OFFSET=" };
 
+    private static int firstDayOfWeekCache = -1;
+    private static int minimalDaysInFirstWeekCache = -1;
+    private static TLocale cacheFor;
+
     protected TCalendar() {
         this(TLocale.getDefault());
     }
@@ -157,6 +161,7 @@ public abstract class TCalendar implements TSerializable, TCloneable, TComparabl
         setLenient(true);
         setFirstDayOfWeek(resolveFirstDayOfWeek(locale));
         setMinimalDaysInFirstWeek(resolveMinimalDaysInFirstWeek(locale));
+        cacheFor = locale;
     }
 
     private static String resolveCountry(TLocale locale) {
@@ -170,15 +175,24 @@ public abstract class TCalendar implements TSerializable, TCloneable, TComparabl
     }
 
     private static int resolveFirstDayOfWeek(TLocale locale) {
+        if (locale == cacheFor && firstDayOfWeekCache >= 0) {
+            return firstDayOfWeekCache;
+        }
         String country = resolveCountry(locale);
         ResourceMap<IntResource> dayMap = CLDRHelper.getFirstDayOfWeek();
-        return dayMap.has(country) ? dayMap.get(country).getValue() : dayMap.get("001").getValue();
+        firstDayOfWeekCache = dayMap.has(country) ? dayMap.get(country).getValue() : dayMap.get("001").getValue();
+        return firstDayOfWeekCache;
     }
 
     private static int resolveMinimalDaysInFirstWeek(TLocale locale) {
+        if (locale == cacheFor && minimalDaysInFirstWeekCache >= 0) {
+            return minimalDaysInFirstWeekCache;
+        }
         String country = resolveCountry(locale);
         ResourceMap<IntResource> dayMap = CLDRHelper.getMinimalDaysInFirstWeek();
-        return dayMap.has(country) ? dayMap.get(country).getValue() : dayMap.get("001").getValue();
+        minimalDaysInFirstWeekCache = dayMap.has(country) ? dayMap.get(country).getValue() :
+                dayMap.get("001").getValue();
+        return minimalDaysInFirstWeekCache;
     }
 
     abstract public void add(int field, int value);

teavm-core/src/main/resources/org/teavm/javascript/runtime.js

@@ -598,6 +598,7 @@ Long.prototype.toString = function() {
     return positive ? result : "-" + result;
 }
 var Long_ZERO = new Long(0, 0);
+var Long_MAX_NORMAL = 1 << 18;
 function Long_fromInt(val) {
     return val >= 0 ? new Long(val, 0) : new Long(val, -1);
 }
@@ -619,6 +620,8 @@ function Long_toNumber(val) {
 function Long_add(a, b) {
     if (a.hi === (a.lo >> 31) && b.hi === (b.lo >> 31)) {
         return Long_fromNumber(a.lo + b.lo);
+    } else if (Math.abs(a.hi) < Long_MAX_NORMAL && Math.abs(b.hi) < Long_MAX_NORMAL) {
+        return Long_fromNumber(Long_toNumber(a) + Long_toNumber(b));
     }
     var a_lolo = a.lo & 0xFFFF;
     var a_lohi = a.lo >>> 16;
@@ -729,13 +732,13 @@ function Long_mul(a, b) {
     return positive ? result : Long_neg(result);
 }
 function Long_div(a, b) {
-    if (a.hi === 0 && b.hi === 0) {
+    if (Math.abs(a.hi) < Long_MAX_NORMAL && Math.abs(b.hi) < Long_MAX_NORMAL) {
         return Long_fromNumber(Long_toNumber(a) / Long_toNumber(b));
     }
     return Long_divRem(a, b)[0];
 }
 function Long_rem(a, b) {
-    if (a.hi === 0 && b.hi === 0) {
+    if (Math.abs(a.hi) < Long_MAX_NORMAL && Math.abs(b.hi) < Long_MAX_NORMAL) {
         return Long_fromNumber(Long_toNumber(a) % Long_toNumber(b));
     }
     return Long_divRem(a, b)[1];

teavm-dom/src/main/java/org/teavm/dom/canvas/CanvasGradient.java

@@ -22,12 +22,12 @@ import org.teavm.jso.JSObject;
  * @author Alexey Andreev
  */
 public interface CanvasGradient extends JSObject {
-    
     /**
-     * The CanvasGradient.addColorStop() method adds a new stop, defined by an 
+     * <p>The CanvasGradient.addColorStop() method adds a new stop, defined by an
      * offset and a color, to the gradient. If the offset is not between 0 and 1,
      * an INDEX_SIZE_ERR is raised, if the color can't be parsed as a CSS color,
-     * a SYNTAX_ERR is raised.
+     * a SYNTAX_ERR is raised.</p>
+     *
      * @param offset Offset between 0 and 1
      * @param color A CSS parseable color.
      */

teavm-tests/src/test/java/org/teavm/classlib/java/util/TimeZoneTest.java

@@ -24,7 +24,6 @@ import java.util.Date;
 import java.util.GregorianCalendar;
 import java.util.TimeZone;
 import org.junit.Test;
-import org.teavm.classlib.impl.tz.DateTimeZoneProvider;
 
 /**
  *
@@ -36,9 +35,6 @@ public class TimeZoneTest {
     @Test
     public void test_getDefault() {
         assertNotSame("returns identical", TimeZone.getDefault(), TimeZone.getDefault());
-        for (int i = 0; i < 30; ++i) {
-            DateTimeZoneProvider.detectTimezone();
-        }
     }
 
     @Test