static final HashMap<S, Method[]> callMC_cache = new HashMap;
static S callMC_key;
static Method callMC_value;

// varargs assignment fixer for a single string array argument
static Object callMC(S method, S[] arg) {
  ret callMC(method, new O[] {arg});
}

static O callMC(S method, O... args) ctex {
  Method me;
  synchronized(callMC_cache) {
    me = method == callMC_key ? callMC_value : null;
  }
  if (me != null) ret callMC_value.invoke(null, args);

  Method[] m;
  synchronized(callMC_cache) {
    m = callMC_cache.get(method);
  }
  if (m == null) {
    if (callMC_cache.isEmpty()) {
      callMC_makeCache();
      m = callMC_cache.get(method);
    }
    if (m == null) fail("Method named " + method + " not found in main");
  }
  int n = m.length;
  if (n == 1) {
    me = m[0];
    synchronized(callMC_cache) {
      callMC_key = method;
      callMC_value = me;
    }
    ret me.invoke(null, args);
  }
  for i to n: {
    me = m[i];
    if (call_checkArgs(me, args, false))
      ret me.invoke(null, args);
  }
  fail("No method called " + method + " with matching arguments found in main");
}

static void callMC_makeCache() {
  synchronized(callMC_cache) {
    callMC_cache.clear();
    Class _c = (Class) mc(), c = _c;
    while (c != null) {
      for (Method m : c.getDeclaredMethods())
        if ((m.getModifiers() & Modifier.STATIC) != 0
          && !reflection_isForbiddenMethod(m)) {
          m.setAccessible(true);
          multiMapPut_array(callMC_cache, m.getName(), m);
        }
      c = c.getSuperclass();
    }
  }
}

Began life as a copy of #1005370