split roundtrip benchmarks into encrypt & decrypt, include throughput numbers

Split up the roundtrip benchmarks into individual `Encrypt` & `Decrypt` benchmarks for different sized test data: `1B`, `64B`, `1KB`, `64KB`, `1MB`, `64MB`. Also show the throughput for comparing the performance of different combinations of primitives for large & small chunks.

```
BenchmarkEncrypt1BWithOAEPAndGCM	   10000	    114864 ns/op	   0.01 MB/s	   12638 B/op	      75 allocs/op
BenchmarkEncrypt64BWithOAEPAndGCM	   10000	    115537 ns/op	   0.55 MB/s	   12686 B/op	      75 allocs/op
BenchmarkEncrypt1KBWithOAEPAndGCM	   10000	    123628 ns/op	   8.28 MB/s	   13758 B/op	      75 allocs/op
BenchmarkEncrypt64KBWithOAEPAndGCM	    2000	    662730 ns/op	  98.89 MB/s	   86334 B/op	      75 allocs/op
BenchmarkEncrypt1MBWithOAEPAndGCM	     200	   8785713 ns/op	 119.35 MB/s	 1069376 B/op	      75 allocs/op
BenchmarkEncrypt64MBWithOAEPAndGCM	       2	 584397283 ns/op	 114.83 MB/s	67129720 B/op	      76 allocs/op
BenchmarkEncrypt1BWithPKCSAndGCM	   10000	    127337 ns/op	   0.01 MB/s	   12424 B/op	      69 allocs/op
BenchmarkEncrypt64BWithPKCSAndGCM	   10000	    128795 ns/op	   0.50 MB/s	   12472 B/op	      69 allocs/op
BenchmarkEncrypt1KBWithPKCSAndGCM	   10000	    135240 ns/op	   7.57 MB/s	   13544 B/op	      69 allocs/op
BenchmarkEncrypt64KBWithPKCSAndGCM	    2000	    680176 ns/op	  96.35 MB/s	   86120 B/op	      69 allocs/op
BenchmarkEncrypt1MBWithPKCSAndGCM	     200	   8772844 ns/op	 119.53 MB/s	 1069162 B/op	      69 allocs/op
BenchmarkEncrypt64MBWithPKCSAndGCM	       2	 564252096 ns/op	 118.93 MB/s	67129504 B/op	      70 allocs/op
BenchmarkEncrypt1BWithOAEPAndCBC	   10000	    118616 ns/op	   0.01 MB/s	   13241 B/op	      84 allocs/op
BenchmarkEncrypt64BWithOAEPAndCBC	   10000	    120028 ns/op	   0.53 MB/s	   13608 B/op	      85 allocs/op
BenchmarkEncrypt1KBWithOAEPAndCBC	   10000	    128142 ns/op	   7.99 MB/s	   16616 B/op	      85 allocs/op
BenchmarkEncrypt64KBWithOAEPAndCBC	    2000	    644277 ns/op	 101.72 MB/s	  234345 B/op	      85 allocs/op
BenchmarkEncrypt1MBWithOAEPAndCBC	     200	   8524903 ns/op	 123.00 MB/s	 3183471 B/op	      85 allocs/op
BenchmarkEncrypt64MBWithOAEPAndCBC	       2	 570160413 ns/op	 117.70 MB/s	201364448 B/op	      87 allocs/op
BenchmarkEncrypt1BWithPKCSAndCBC	   10000	    127071 ns/op	   0.01 MB/s	   13024 B/op	      78 allocs/op
BenchmarkEncrypt64BWithPKCSAndCBC	   10000	    126608 ns/op	   0.51 MB/s	   13392 B/op	      79 allocs/op
BenchmarkEncrypt1KBWithPKCSAndCBC	   10000	    134742 ns/op	   7.60 MB/s	   16400 B/op	      79 allocs/op
BenchmarkEncrypt64KBWithPKCSAndCBC	    2000	    646394 ns/op	 101.39 MB/s	  234128 B/op	      79 allocs/op
BenchmarkEncrypt1MBWithPKCSAndCBC	     200	   8484957 ns/op	 123.58 MB/s	 3183253 B/op	      79 allocs/op
BenchmarkEncrypt64MBWithPKCSAndCBC	       2	 544417620 ns/op	 123.27 MB/s	201364224 B/op	      81 allocs/op
BenchmarkEncrypt1BWithDirectGCM128	  200000	      6359 ns/op	   0.16 MB/s	    2632 B/op	      39 allocs/op
BenchmarkEncrypt64BWithDirectGCM128	  200000	      6804 ns/op	   9.40 MB/s	    2680 B/op	      39 allocs/op
BenchmarkEncrypt1KBWithDirectGCM128	  100000	     15295 ns/op	  66.95 MB/s	    3752 B/op	      39 allocs/op
BenchmarkEncrypt64KBWithDirectGCM128	    3000	    588655 ns/op	 111.33 MB/s	   76328 B/op	      39 allocs/op
BenchmarkEncrypt1MBWithDirectGCM128	     200	   9300478 ns/op	 112.74 MB/s	 1059370 B/op	      39 allocs/op
BenchmarkEncrypt64MBWithDirectGCM128	       2	 589059919 ns/op	 113.93 MB/s	67119712 B/op	      40 allocs/op
BenchmarkEncrypt1BWithDirectCBC128	  200000	      9155 ns/op	   0.11 MB/s	    3008 B/op	      48 allocs/op
BenchmarkEncrypt64BWithDirectCBC128	  200000	      9882 ns/op	   6.48 MB/s	    3312 B/op	      49 allocs/op
BenchmarkEncrypt1KBWithDirectCBC128	  100000	     17533 ns/op	  58.40 MB/s	    6384 B/op	      49 allocs/op
BenchmarkEncrypt64KBWithDirectCBC128	    3000	    536457 ns/op	 122.16 MB/s	  224112 B/op	      49 allocs/op
BenchmarkEncrypt1MBWithDirectCBC128	     200	   8344933 ns/op	 125.65 MB/s	 3173237 B/op	      49 allocs/op
BenchmarkEncrypt64MBWithDirectCBC128	       2	 542799030 ns/op	 123.63 MB/s	201354208 B/op	      51 allocs/op
BenchmarkEncrypt1BWithDirectGCM256	  200000	      6428 ns/op	   0.16 MB/s	    2632 B/op	      39 allocs/op
BenchmarkEncrypt64BWithDirectGCM256	  200000	      6728 ns/op	   9.51 MB/s	    2680 B/op	      39 allocs/op
BenchmarkEncrypt1KBWithDirectGCM256	  100000	     15343 ns/op	  66.74 MB/s	    3752 B/op	      39 allocs/op
BenchmarkEncrypt64KBWithDirectGCM256	    3000	    589663 ns/op	 111.14 MB/s	   76328 B/op	      39 allocs/op
BenchmarkEncrypt1MBWithDirectGCM256	     200	   9222674 ns/op	 113.70 MB/s	 1059370 B/op	      39 allocs/op
BenchmarkEncrypt64MBWithDirectGCM256	       2	 585505726 ns/op	 114.62 MB/s	67119712 B/op	      40 allocs/op
BenchmarkEncrypt1BWithDirectCBC256	  200000	      9253 ns/op	   0.11 MB/s	    3008 B/op	      48 allocs/op
BenchmarkEncrypt64BWithDirectCBC256	  200000	      9807 ns/op	   6.53 MB/s	    3312 B/op	      49 allocs/op
BenchmarkEncrypt1KBWithDirectCBC256	  100000	     17566 ns/op	  58.29 MB/s	    6384 B/op	      49 allocs/op
BenchmarkEncrypt64KBWithDirectCBC256	    3000	    534048 ns/op	 122.72 MB/s	  224112 B/op	      49 allocs/op
BenchmarkEncrypt1MBWithDirectCBC256	     200	   8321683 ns/op	 126.01 MB/s	 3173237 B/op	      49 allocs/op
BenchmarkEncrypt64MBWithDirectCBC256	       2	 547308969 ns/op	 122.62 MB/s	201354208 B/op	      51 allocs/op
BenchmarkEncrypt1BWithAESKWAndGCM128	  200000	      9342 ns/op	   0.11 MB/s	    3128 B/op	      47 allocs/op
BenchmarkEncrypt64BWithAESKWAndGCM128	  200000	      9700 ns/op	   6.60 MB/s	    3176 B/op	      47 allocs/op
BenchmarkEncrypt1KBWithAESKWAndGCM128	  100000	     17646 ns/op	  58.03 MB/s	    4248 B/op	      47 allocs/op
BenchmarkEncrypt64KBWithAESKWAndGCM128	    3000	    554686 ns/op	 118.15 MB/s	   76824 B/op	      47 allocs/op
BenchmarkEncrypt1MBWithAESKWAndGCM128	     200	   8641684 ns/op	 121.34 MB/s	 1059866 B/op	      47 allocs/op
BenchmarkEncrypt64MBWithAESKWAndGCM128	       2	 559784808 ns/op	 119.88 MB/s	67120208 B/op	      48 allocs/op
BenchmarkEncrypt1BWithAESKWAndCBC256	  200000	     11456 ns/op	   0.09 MB/s	    3352 B/op	      49 allocs/op
BenchmarkEncrypt64BWithAESKWAndCBC256	  100000	     11933 ns/op	   5.36 MB/s	    3400 B/op	      49 allocs/op
BenchmarkEncrypt1KBWithAESKWAndCBC256	  100000	     20265 ns/op	  50.53 MB/s	    4472 B/op	      49 allocs/op
BenchmarkEncrypt64KBWithAESKWAndCBC256	    3000	    594063 ns/op	 110.32 MB/s	   77048 B/op	      49 allocs/op
BenchmarkEncrypt1MBWithAESKWAndCBC256	     200	   9230010 ns/op	 113.61 MB/s	 1060090 B/op	      49 allocs/op
BenchmarkEncrypt64MBWithAESKWAndCBC256	       2	 597983574 ns/op	 112.23 MB/s	67120432 B/op	      50 allocs/op
BenchmarkEncrypt1BWithECDHOnP256AndGCM128	    1000	   2033810 ns/op	   0.00 MB/s	    9544 B/op	     159 allocs/op
BenchmarkEncrypt64BWithECDHOnP256AndGCM128	    1000	   2031713 ns/op	   0.03 MB/s	    9597 B/op	     159 allocs/op
BenchmarkEncrypt1KBWithECDHOnP256AndGCM128	    1000	   2043545 ns/op	   0.50 MB/s	   10671 B/op	     159 allocs/op
BenchmarkEncrypt64KBWithECDHOnP256AndGCM128	     500	   2572098 ns/op	  25.48 MB/s	   83240 B/op	     159 allocs/op
BenchmarkEncrypt1MBWithECDHOnP256AndGCM128	     100	  10734176 ns/op	  97.69 MB/s	 1066294 B/op	     159 allocs/op
BenchmarkEncrypt64MBWithECDHOnP256AndGCM128	       2	 553348072 ns/op	 121.28 MB/s	67126592 B/op	     160 allocs/op
BenchmarkEncrypt1BWithECDHOnP384AndGCM128	     100	  12745101 ns/op	   0.00 MB/s	 5667299 B/op	   58988 allocs/op
BenchmarkEncrypt64BWithECDHOnP384AndGCM128	     100	  12631938 ns/op	   0.01 MB/s	 5646994 B/op	   58781 allocs/op
BenchmarkEncrypt1KBWithECDHOnP384AndGCM128	     100	  12736010 ns/op	   0.08 MB/s	 5671276 B/op	   59023 allocs/op
BenchmarkEncrypt64KBWithECDHOnP384AndGCM128	     100	  13273116 ns/op	   4.94 MB/s	 5732568 B/op	   58902 allocs/op
BenchmarkEncrypt1MBWithECDHOnP384AndGCM128	     100	  21666116 ns/op	  48.40 MB/s	 6714229 B/op	   58885 allocs/op
BenchmarkEncrypt64MBWithECDHOnP384AndGCM128	       2	 589203147 ns/op	 113.90 MB/s	72731584 B/op	   58517 allocs/op
BenchmarkEncrypt1BWithECDHOnP521AndGCM128	     100	  22724400 ns/op	   0.00 MB/s	10330404 B/op	   89314 allocs/op
BenchmarkEncrypt64BWithECDHOnP521AndGCM128	      50	  23323938 ns/op	   0.00 MB/s	10365208 B/op	   89611 allocs/op
BenchmarkEncrypt1KBWithECDHOnP521AndGCM128	     100	  23369009 ns/op	   0.04 MB/s	10339675 B/op	   89366 allocs/op
BenchmarkEncrypt64KBWithECDHOnP521AndGCM128	     100	  23689319 ns/op	   2.77 MB/s	10418313 B/op	   89420 allocs/op
BenchmarkEncrypt1MBWithECDHOnP521AndGCM128	      50	  32499965 ns/op	  32.26 MB/s	11336803 B/op	   88884 allocs/op
BenchmarkEncrypt64MBWithECDHOnP521AndGCM128	       2	 590291252 ns/op	 113.69 MB/s	77337960 B/op	   88319 allocs/op
BenchmarkDecrypt1BWithOAEPAndGCM	     200	   6806851 ns/op	   0.00 MB/s	  994684 B/op	    7437 allocs/op
BenchmarkDecrypt64BWithOAEPAndGCM	     200	   6733866 ns/op	   0.01 MB/s	  992361 B/op	    7424 allocs/op
BenchmarkDecrypt1KBWithOAEPAndGCM	     200	   6614587 ns/op	   0.15 MB/s	  994735 B/op	    7428 allocs/op
BenchmarkDecrypt64KBWithOAEPAndGCM	     200	   7263697 ns/op	   9.02 MB/s	 1058156 B/op	    7420 allocs/op
BenchmarkDecrypt1MBWithOAEPAndGCM	     100	  15562798 ns/op	  67.38 MB/s	 2039794 B/op	    7414 allocs/op
BenchmarkDecrypt64MBWithOAEPAndGCM	       2	 559648415 ns/op	 119.91 MB/s	68094696 B/op	    7400 allocs/op
BenchmarkDecrypt1BWithPKCSAndGCM	     200	   6773018 ns/op	   0.00 MB/s	  992507 B/op	    7421 allocs/op
BenchmarkDecrypt64BWithPKCSAndGCM	     200	   6992753 ns/op	   0.01 MB/s	  993460 B/op	    7425 allocs/op
BenchmarkDecrypt1KBWithPKCSAndGCM	     200	   6800349 ns/op	   0.15 MB/s	  993402 B/op	    7418 allocs/op
BenchmarkDecrypt64KBWithPKCSAndGCM	     200	   7296990 ns/op	   8.98 MB/s	 1058608 B/op	    7419 allocs/op
BenchmarkDecrypt1MBWithPKCSAndGCM	     100	  15542436 ns/op	  67.47 MB/s	 2040074 B/op	    7407 allocs/op
BenchmarkDecrypt64MBWithPKCSAndGCM	       2	 558156205 ns/op	 120.23 MB/s	68119552 B/op	    7536 allocs/op
BenchmarkDecrypt1BWithOAEPAndCBC	     200	   6701219 ns/op	   0.00 MB/s	  994712 B/op	    7435 allocs/op
BenchmarkDecrypt64BWithOAEPAndCBC	     200	   6636243 ns/op	   0.01 MB/s	  992489 B/op	    7420 allocs/op
BenchmarkDecrypt1KBWithOAEPAndCBC	     200	   6657514 ns/op	   0.15 MB/s	  994128 B/op	    7424 allocs/op
BenchmarkDecrypt64KBWithOAEPAndCBC	     200	   6948515 ns/op	   9.43 MB/s	 1066024 B/op	    7422 allocs/op
BenchmarkDecrypt1MBWithOAEPAndCBC	     100	  11911074 ns/op	  88.03 MB/s	 2058627 B/op	    7416 allocs/op
BenchmarkDecrypt64MBWithOAEPAndCBC	       3	 400618795 ns/op	 167.51 MB/s	90486418 B/op	    7482 allocs/op
BenchmarkDecrypt1BWithPKCSAndCBC	     200	   6678279 ns/op	   0.00 MB/s	  993940 B/op	    7431 allocs/op
BenchmarkDecrypt64BWithPKCSAndCBC	     200	   6662427 ns/op	   0.01 MB/s	  993386 B/op	    7424 allocs/op
BenchmarkDecrypt1KBWithPKCSAndCBC	     200	   6809190 ns/op	   0.15 MB/s	  997263 B/op	    7446 allocs/op
BenchmarkDecrypt64KBWithPKCSAndCBC	     200	   7070785 ns/op	   9.27 MB/s	 1068240 B/op	    7430 allocs/op
BenchmarkDecrypt1MBWithPKCSAndCBC	     100	  12009873 ns/op	  87.31 MB/s	 2060018 B/op	    7423 allocs/op
BenchmarkDecrypt64MBWithPKCSAndCBC	       3	 409642644 ns/op	 163.82 MB/s	90480978 B/op	    7445 allocs/op
BenchmarkDecrypt1BWithDirectGCM128	  300000	      4623 ns/op	   0.22 MB/s	    1736 B/op	      32 allocs/op
BenchmarkDecrypt64BWithDirectGCM128	  300000	      5083 ns/op	  12.59 MB/s	    1792 B/op	      32 allocs/op
BenchmarkDecrypt1KBWithDirectGCM128	  100000	     13646 ns/op	  75.04 MB/s	    2752 B/op	      32 allocs/op
BenchmarkDecrypt64KBWithDirectGCM128	    3000	    586645 ns/op	 111.71 MB/s	   67264 B/op	      32 allocs/op
BenchmarkDecrypt1MBWithDirectGCM128	     200	   9301046 ns/op	 112.74 MB/s	 1050304 B/op	      32 allocs/op
BenchmarkDecrypt64MBWithDirectGCM128	       2	 591459680 ns/op	 113.46 MB/s	67110624 B/op	      32 allocs/op
BenchmarkDecrypt1BWithDirectCBC128	  200000	      6398 ns/op	   0.16 MB/s	    1944 B/op	      36 allocs/op
BenchmarkDecrypt64BWithDirectCBC128	  200000	      6951 ns/op	   9.21 MB/s	    2136 B/op	      37 allocs/op
BenchmarkDecrypt1KBWithDirectCBC128	  100000	     11843 ns/op	  86.46 MB/s	    3096 B/op	      37 allocs/op
BenchmarkDecrypt64KBWithDirectCBC128	    5000	    335986 ns/op	 195.06 MB/s	   75685 B/op	      37 allocs/op
BenchmarkDecrypt1MBWithDirectCBC128	     300	   5220608 ns/op	 200.85 MB/s	 1062208 B/op	      37 allocs/op
BenchmarkDecrypt64MBWithDirectCBC128	       3	 402232473 ns/op	 166.84 MB/s	89488690 B/op	      39 allocs/op
BenchmarkDecrypt1BWithDirectGCM256	  300000	      4623 ns/op	   0.22 MB/s	    1736 B/op	      32 allocs/op
BenchmarkDecrypt64BWithDirectGCM256	  300000	      5062 ns/op	  12.64 MB/s	    1792 B/op	      32 allocs/op
BenchmarkDecrypt1KBWithDirectGCM256	  100000	     13679 ns/op	  74.86 MB/s	    2752 B/op	      32 allocs/op
BenchmarkDecrypt64KBWithDirectGCM256	    2000	    595367 ns/op	 110.08 MB/s	   67264 B/op	      32 allocs/op
BenchmarkDecrypt1MBWithDirectGCM256	     200	   9291817 ns/op	 112.85 MB/s	 1050304 B/op	      32 allocs/op
BenchmarkDecrypt64MBWithDirectGCM256	       2	 587836149 ns/op	 114.16 MB/s	67110624 B/op	      32 allocs/op
BenchmarkDecrypt1BWithDirectCBC256	  200000	      6448 ns/op	   0.16 MB/s	    1944 B/op	      36 allocs/op
BenchmarkDecrypt64BWithDirectCBC256	  200000	      6906 ns/op	   9.27 MB/s	    2136 B/op	      37 allocs/op
BenchmarkDecrypt1KBWithDirectCBC256	  200000	     11720 ns/op	  87.37 MB/s	    3096 B/op	      37 allocs/op
BenchmarkDecrypt64KBWithDirectCBC256	    5000	    327982 ns/op	 199.82 MB/s	   75685 B/op	      37 allocs/op
BenchmarkDecrypt1MBWithDirectCBC256	     300	   5173627 ns/op	 202.68 MB/s	 1062208 B/op	      37 allocs/op
BenchmarkDecrypt64MBWithDirectCBC256	       3	 395953403 ns/op	 169.49 MB/s	89488690 B/op	      39 allocs/op
BenchmarkDecrypt1BWithAESKWAndGCM128	  200000	      6121 ns/op	   0.16 MB/s	    2200 B/op	      39 allocs/op
BenchmarkDecrypt64BWithAESKWAndGCM128	  200000	      6498 ns/op	   9.85 MB/s	    2256 B/op	      39 allocs/op
BenchmarkDecrypt1KBWithAESKWAndGCM128	  100000	     14523 ns/op	  70.51 MB/s	    3216 B/op	      39 allocs/op
BenchmarkDecrypt64KBWithAESKWAndGCM128	    3000	    545609 ns/op	 120.12 MB/s	   67728 B/op	      39 allocs/op
BenchmarkDecrypt1MBWithAESKWAndGCM128	     200	   8749088 ns/op	 119.85 MB/s	 1050768 B/op	      39 allocs/op
BenchmarkDecrypt64MBWithAESKWAndGCM128	       2	 551432594 ns/op	 121.70 MB/s	67111088 B/op	      39 allocs/op
BenchmarkDecrypt1BWithAESKWAndCBC256	  200000	      7227 ns/op	   0.14 MB/s	    2408 B/op	      41 allocs/op
BenchmarkDecrypt64BWithAESKWAndCBC256	  200000	      7552 ns/op	   8.47 MB/s	    2464 B/op	      41 allocs/op
BenchmarkDecrypt1KBWithAESKWAndCBC256	  100000	     16171 ns/op	  63.32 MB/s	    3424 B/op	      41 allocs/op
BenchmarkDecrypt64KBWithAESKWAndCBC256	    3000	    588466 ns/op	 111.37 MB/s	   67936 B/op	      41 allocs/op
BenchmarkDecrypt1MBWithAESKWAndCBC256	     200	   9235014 ns/op	 113.54 MB/s	 1050976 B/op	      41 allocs/op
BenchmarkDecrypt64MBWithAESKWAndCBC256	       2	 601283259 ns/op	 111.61 MB/s	67111296 B/op	      41 allocs/op
BenchmarkDecrypt1BWithECDHOnP256AndGCM128	    1000	   1500135 ns/op	   0.00 MB/s	    6440 B/op	     121 allocs/op
BenchmarkDecrypt64BWithECDHOnP256AndGCM128	    1000	   1490829 ns/op	   0.04 MB/s	    6496 B/op	     121 allocs/op
BenchmarkDecrypt1KBWithECDHOnP256AndGCM128	    1000	   1492366 ns/op	   0.69 MB/s	    7456 B/op	     121 allocs/op
BenchmarkDecrypt64KBWithECDHOnP256AndGCM128	    1000	   2032864 ns/op	  32.24 MB/s	   71872 B/op	     120 allocs/op
BenchmarkDecrypt1MBWithECDHOnP256AndGCM128	     100	  10083317 ns/op	 103.99 MB/s	 1054912 B/op	     120 allocs/op
BenchmarkDecrypt64MBWithECDHOnP256AndGCM128	       2	 567913503 ns/op	 118.17 MB/s	67115344 B/op	     122 allocs/op
BenchmarkDecrypt1BWithECDHOnP384AndGCM128	     200	   6150085 ns/op	   0.00 MB/s	 2742691 B/op	   28535 allocs/op
BenchmarkDecrypt64BWithECDHOnP384AndGCM128	     200	   6173224 ns/op	   0.01 MB/s	 2745948 B/op	   28627 allocs/op
BenchmarkDecrypt1KBWithECDHOnP384AndGCM128	     200	   6219548 ns/op	   0.16 MB/s	 2742284 B/op	   28543 allocs/op
BenchmarkDecrypt64KBWithECDHOnP384AndGCM128	     200	   6708501 ns/op	   9.77 MB/s	 2805499 B/op	   28515 allocs/op
BenchmarkDecrypt1MBWithECDHOnP384AndGCM128	     100	  14888397 ns/op	  70.43 MB/s	 3788460 B/op	   28511 allocs/op
BenchmarkDecrypt64MBWithECDHOnP384AndGCM128	       2	 554409101 ns/op	 121.05 MB/s	69852424 B/op	   28569 allocs/op
BenchmarkDecrypt1BWithECDHOnP521AndGCM128	     100	  11526405 ns/op	   0.00 MB/s	 5183103 B/op	   44762 allocs/op
BenchmarkDecrypt64BWithECDHOnP521AndGCM128	     100	  11684190 ns/op	   0.01 MB/s	 5183759 B/op	   44776 allocs/op
BenchmarkDecrypt1KBWithECDHOnP521AndGCM128	     100	  11820154 ns/op	   0.09 MB/s	 5190198 B/op	   44926 allocs/op
BenchmarkDecrypt64KBWithECDHOnP521AndGCM128	     100	  12358636 ns/op	   5.30 MB/s	 5254134 B/op	   44882 allocs/op
BenchmarkDecrypt1MBWithECDHOnP521AndGCM128	     100	  20894700 ns/op	  50.18 MB/s	 6227144 B/op	   44727 allocs/op
BenchmarkDecrypt64MBWithECDHOnP521AndGCM128	       2	 579692130 ns/op	 115.77 MB/s	72291416 B/op
```

Also, for comparison: `go get github.com/benburkert/lockbox && go test -run=XXX -bench=. -benchmem github.com/benburkert/lockbox` :wink: