Remove Enum.HasFlag usage

[lahma]

• cleanup Array capacity usage

Jint.Benchmark.ArrayBenchmark

Diff	Method	N	Mean	Error	Allocated
Old	Slice	100	130.0 μs	2.40 μs	261.72 KB
New			130.0 μs (0%)	1.26 μs	261.72 KB (0%)
Old	Concat	100	158.7 μs	2.51 μs	301.56 KB
New			162.6 μs (+2%)	2.05 μs	301.56 KB (0%)
Old	Unshift	100	3,974.6 μs	52.74 μs	3521.1 KB
New			3,599.1 μs (-9%)	23.64 μs	950.78 KB (-73%)
Old	Push	100	2,544.4 μs	47.43 μs	857.81 KB
New			2,456.0 μs (-3%)	28.59 μs	857.81 KB (0%)
Old	Index	100	2,091.3 μs	30.77 μs	797.66 KB
New			2,036.7 μs (-3%)	13.99 μs	797.66 KB (0%)
Old	Map	100	1,321.4 μs	9.44 μs	3105.47 KB
New			1,267.4 μs (-4%)	24.30 μs	3105.47 KB (0%)
Old	Apply	100	203.6 μs	2.66 μs	381.25 KB
New			199.5 μs (-2%)	3.36 μs	381.25 KB (0%)
Old	JsonStringifyParse	100	767.5 μs	10.07 μs	1139.84 KB
New			723.1 μs (-6%)	11.36 μs	1139.84 KB (0%)
Old	FilterWithString	100	13,550.1 μs	87.94 μs	31723.44 KB
New			12,957.8 μs (-4%)	157.20 μs	31723.44 KB (0%)

Jint.Benchmark.DromaeoBenchmark

Diff	Method	FileName	Mean	Error	Allocated
Old	Run	dromaeo-3d-cube	15.361 ms	0.2319 ms	6304.9 KB
New			14.371 ms (-6%)	0.1843 ms	6304.9 KB (0%)
Old	Run	dromaeo-core-eval	2.965 ms	0.0272 ms	327.84 KB
New			2.907 ms (-2%)	0.0515 ms	327.85 KB (0%)
Old	Run	dromaeo-object-array	30.340 ms	0.2168 ms	100367.74 KB
New			30.342 ms (0%)	0.5993 ms	96259.97 KB (-4%)
Old	Run	droma(...)egexp [21]	125.913 ms	2.4917 ms	149305.36 KB
New			123.978 ms (-2%)	2.4238 ms	149512.19 KB (0%)
Old	Run	droma(...)tring [21]	244.682 ms	7.4719 ms	1315772.28 KB
New			254.491 ms (+4%)	12.2366 ms	1315824.61 KB (0%)
Old	Run	droma(...)ase64 [21]	32.340 ms	0.3925 ms	2367.97 KB
New			31.735 ms (-2%)	0.3830 ms	2367.97 KB (0%)
Old	Run	dromaeo-3d-cube	14.309 ms	0.2242 ms	5966.65 KB
New			14.210 ms (-1%)	0.1203 ms	5966.65 KB (0%)
Old	Run	dromaeo-core-eval	2.756 ms	0.0360 ms	312.78 KB
New			2.838 ms (+3%)	0.0369 ms	312.77 KB (0%)
Old	Run	dromaeo-object-array	30.960 ms	0.2786 ms	100320.34 KB
New			30.122 ms (-3%)	0.4704 ms	96212.55 KB (-4%)
Old	Run	droma(...)egexp [21]	91.318 ms	1.8183 ms	149465.94 KB
New			89.879 ms (-2%)	1.7373 ms	152114.11 KB (+2%)
Old	Run	droma(...)tring [21]	245.548 ms	7.9732 ms	1315748.16 KB
New			257.183 ms (+5%)	10.7585 ms	1315791.94 KB (0%)
Old	Run	droma(...)ase64 [21]	30.625 ms	0.2784 ms	2268.79 KB
New			31.143 ms (+2%)	0.2223 ms	2268.79 KB (0%)

Jint.Benchmark.SunSpiderBenchmark

Diff	Method	FileName	Mean	Error	Allocated
Old	Run	3d-cube	114.75 ms	1.258 ms	45166.13 KB
New			112.53 ms (-2%)	1.339 ms	45166.13 KB (0%)
Old	Run	3d-morph	101.34 ms	0.999 ms	46258.23 KB
New			102.93 ms (+2%)	0.760 ms	46258.23 KB (0%)
Old	Run	3d-raytrace	111.46 ms	1.184 ms	86421.18 KB
New			110.41 ms (-1%)	1.443 ms	86421.11 KB (0%)
Old	Run	access-binary-trees	61.46 ms	0.812 ms	62249.49 KB
New			59.85 ms (-3%)	1.071 ms	62249.48 KB (0%)
Old	Run	access-fannkuch	258.02 ms	3.203 ms	103.93 KB
New			251.60 ms (-2%)	2.830 ms	103.93 KB (0%)
Old	Run	access-nbody	119.50 ms	1.098 ms	53296.5 KB
New			116.24 ms (-3%)	1.778 ms	53296.43 KB (0%)
Old	Run	access-nsieve	84.69 ms	0.744 ms	17142.87 KB
New			80.19 ms (-5%)	1.314 ms	17143.41 KB (0%)
Old	Run	bitop(...)-byte [24]	94.56 ms	1.852 ms	61948.56 KB
New			89.96 ms (-5%)	1.604 ms	61948.61 KB (0%)
Old	Run	bitops-bits-in-byte	139.81 ms	2.126 ms	40544.76 KB
New			133.74 ms (-4%)	2.169 ms	40544.84 KB (0%)
Old	Run	bitops-bitwise-and	75.48 ms	1.149 ms	55939 KB
New			74.95 ms (-1%)	0.752 ms	55939 KB (0%)
Old	Run	bitops-nsieve-bits	130.40 ms	2.524 ms	53916.62 KB
New			121.70 ms (-7%)	1.888 ms	53916.6 KB (0%)
Old	Run	contr(...)rsive [21]	73.50 ms	0.835 ms	92773.21 KB
New			72.07 ms (-2%)	1.402 ms	92773.21 KB (0%)
Old	Run	crypto-aes	77.89 ms	0.978 ms	10776.09 KB
New			78.54 ms (+1%)	1.501 ms	10775.64 KB (0%)
Old	Run	crypto-md5	67.97 ms	1.202 ms	82178.11 KB
New			66.37 ms (-2%)	1.281 ms	82178.15 KB (0%)
Old	Run	crypto-sha1	65.43 ms	0.570 ms	68862.68 KB
New			65.72 ms (0%)	1.272 ms	68862.68 KB (0%)
Old	Run	date-format-tofte	62.58 ms	1.122 ms	56975.49 KB
New			64.63 ms (+3%)	1.244 ms	56975.49 KB (0%)
Old	Run	date-format-xparb	36.36 ms	0.488 ms	26401.74 KB
New			36.01 ms (-1%)	0.564 ms	26401.76 KB (0%)
Old	Run	math-cordic	209.53 ms	3.404 ms	86860.2 KB
New			200.15 ms (-4%)	2.615 ms	86860.2 KB (0%)
Old	Run	math-partial-sums	71.79 ms	0.762 ms	49367.94 KB
New			71.01 ms (-1%)	0.516 ms	49367.98 KB (0%)
Old	Run	math-spectral-norm	75.72 ms	0.965 ms	56617.95 KB
New			77.19 ms (+2%)	1.314 ms	56617.9 KB (0%)
Old	Run	regexp-dna	89.96 ms	1.119 ms	16829.77 KB
New			90.79 ms (+1%)	0.547 ms	16829.07 KB (0%)
Old	Run	string-base64	48.02 ms	0.742 ms	3156.41 KB
New			45.56 ms (-5%)	0.522 ms	3156.41 KB (0%)
Old	Run	string-fasta	106.64 ms	1.291 ms	104786.13 KB
New			108.01 ms (+1%)	1.890 ms	104786.13 KB (0%)
Old	Run	string-tagcloud	52.49 ms	0.905 ms	42082.15 KB
New			50.74 ms (-3%)	0.974 ms	42082.09 KB (0%)
Old	Run	string-unpack-code	48.23 ms	0.943 ms	73813.13 KB
New			47.83 ms (-1%)	0.897 ms	73813.19 KB (0%)
Old	Run	strin(...)input [21]	38.54 ms	0.531 ms	20688.07 KB
New			39.38 ms (+2%)	0.735 ms	20688.07 KB (0%)