Reduce memory allocations in function calls

[lahma]

• make DeclarativeEnvironmentRecord properties lazy
• check AST if there's a real need to have arguments object passed in

[lahma]

Esprima.Benchmark.SunSpiderBenchmark

Diff	Method	FileName	Mean	Error	Allocated
Old	Run	3d-cube	199.57 ms	0.319 ms	50173.05 KB
New			200.04 ms (0%)	0.428 ms	49005.39 KB (-2%)
Old	Run	3d-morph	158.60 ms	0.417 ms	48379.87 KB
New			162.64 ms (+3%)	0.568 ms	48366.35 KB (0%)
Old	Run	3d-raytrace	167.86 ms	0.387 ms	92704.46 KB
New			163.64 ms (-3%)	0.361 ms	88362.81 KB (-5%)
Old	Run	access-binary-trees	82.30 ms	0.229 ms	75722.21 KB
New			75.50 ms (-8%)	0.139 ms	60931.89 KB (-20%)
Old	Run	access-fannkuch	459.86 ms	3.778 ms	134.92 KB
New			433.21 ms (-6%)	0.851 ms	133.82 KB (-1%)
Old	Run	access-nbody	188.20 ms	0.523 ms	63844.97 KB
New			188.57 ms (0%)	0.503 ms	63661.02 KB (0%)
Old	Run	access-nsieve	156.63 ms	0.367 ms	21518.16 KB
New			153.28 ms (-2%)	0.272 ms	21518.14 KB (0%)
Old	Run	bitop(...)-byte [24]	158.50 ms	0.445 ms	68948.69 KB
New			147.65 ms (-7%)	0.302 ms	56948.25 KB (-17%)
Old	Run	bitops-bits-in-byte	232.04 ms	0.421 ms	45444.6 KB
New			249.90 ms (+8%)	0.559 ms	37044.38 KB (-18%)
Old	Run	bitops-bitwise-and	134.57 ms	1.276 ms	55942.53 KB
New			127.43 ms (-5%)	0.708 ms	55938.46 KB (0%)
Old	Run	bitops-nsieve-bits	220.61 ms	4.334 ms	54072.78 KB
New			209.46 ms (-5%)	0.655 ms	54074.29 KB (0%)
Old	Run	contr(...)rsive [21]	127.39 ms	0.982 ms	108772.08 KB
New			96.36 ms (-24%)	0.228 ms	83183.09 KB (-24%)
Old	Run	crypto-aes	143.40 ms	1.500 ms	14935.53 KB
New			133.28 ms (-7%)	0.537 ms	14008.27 KB (-6%)
Old	Run	crypto-md5	106.27 ms	0.358 ms	88403.25 KB
New			96.68 ms (-9%)	0.352 ms	77891.84 KB (-12%)
Old	Run	crypto-sha1	102.85 ms	0.881 ms	75067.3 KB
New			95.53 ms (-7%)	0.156 ms	64563.47 KB (-14%)
Old	Run	date-format-tofte	101.73 ms	0.165 ms	45250.98 KB
New			95.54 ms (-6%)	0.187 ms	43131.97 KB (-5%)
Old	Run	date-format-xparb	57.73 ms	0.188 ms	28787.27 KB
New			55.73 ms (-3%)	0.118 ms	24846 KB (-14%)
Old	Run	math-cordic	327.89 ms	0.503 ms	113031.72 KB
New			325.23 ms (-1%)	0.402 ms	81973.88 KB (-27%)
Old	Run	math-partial-sums	131.58 ms	0.346 ms	50094.9 KB
New			129.19 ms (-2%)	0.460 ms	50094.43 KB (0%)
Old	Run	math-spectral-norm	127.22 ms	0.275 ms	63333.26 KB
New			121.53 ms (-4%)	0.271 ms	51831.58 KB (-18%)
Old	Run	regexp-dna	114.67 ms	0.317 ms	17665.72 KB
New			105.21 ms (-8%)	0.404 ms	17666.21 KB (0%)
Old	Run	string-base64	101.32 ms	0.204 ms	11240.54 KB
New			102.92 ms (+2%)	0.338 ms	11240.63 KB (0%)
Old	Run	string-fasta	190.90 ms	0.634 ms	155489.71 KB
New			186.82 ms (-2%)	1.210 ms	148051.28 KB (-5%)
Old	Run	string-tagcloud	73.02 ms	0.235 ms	48436.63 KB
New			69.00 ms (-6%)	0.142 ms	44111.32 KB (-9%)
Old	Run	string-unpack-code	72.61 ms	0.186 ms	83958.86 KB
New			68.36 ms (-6%)	0.138 ms	74416.94 KB (-11%)
Old	Run	strin(...)input [21]	80.69 ms	0.111 ms	41620.6 KB
New			79.38 ms (-2%)	0.176 ms	39743.73 KB (-5%)