Use unicode.translate to speed up js escaping.

    return mark_safe(force_text(text).replace('&', '&amp;').replace('<', '&lt;').replace('>', '&gt;').replace('"', '&quot;').replace("'", '&#39;'))

escape = allow_lazy(escape, six.text_type)

_base_js_escapes = (

    ('\\', '\\u005C'),

    ('\'', '\\u0027'),

    ('"', '\\u0022'),

    ('>', '\\u003E'),

    ('<', '\\u003C'),

    ('&', '\\u0026'),

    ('=', '\\u003D'),

    ('-', '\\u002D'),

    (';', '\\u003B'),

    ('\u2028', '\\u2028'),

    ('\u2029', '\\u2029')

)

_js_escapes = {

    ord('\\'): '\\u005C',

    ord('\''): '\\u0027',

    ord('"'): '\\u0022',

    ord('>'): '\\u003E',

    ord('<'): '\\u003C',

    ord('&'): '\\u0026',

    ord('='): '\\u003D',

    ord('-'): '\\u002D',

    ord(';'): '\\u003B',

    ord('\u2028'): '\\u2028',

    ord('\u2029'): '\\u2029'

}

# Escape every ASCII character with a value less than 32.

_js_escapes = (_base_js_escapes +

               tuple([('%c' % z, '\\u%04X' % z) for z in range(32)]))

_js_escapes.update((ord('%c' % z), '\\u%04X' % z) for z in range(32))

def escapejs(value):

    """Hex encodes characters for use in JavaScript strings."""

    for bad, good in _js_escapes:

        value = mark_safe(force_text(value).replace(bad, good))

    return value

    return mark_safe(force_text(value).translate(_js_escapes))

escapejs = allow_lazy(escapejs, six.text_type)

def conditional_escape(text):