feat(proto): use memmove on amd64 for int columns

[tdakkota]

name                      old time/op    new time/op     delta
ColInt16_DecodeColumn-12    1.00µs ± 1%     0.10µs ± 2%   -90.47%  (p=0.000 n=23+24)

name                      old speed      new speed       delta
ColInt16_DecodeColumn-12  1.99GB/s ± 1%  20.89GB/s ± 2%  +949.06%  (p=0.000 n=23+24)

[codecov]

Codecov Report

Merging #9 (95b7894) into main (0906ee7) will decrease coverage by 0.70%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main       #9      +/-   ##
==========================================
- Coverage   82.50%   81.79%   -0.71%     
==========================================
  Files          77      103      +26     
  Lines        4355     4219     -136     
==========================================
- Hits         3593     3451     -142     
- Misses        623      627       +4     
- Partials      139      141       +2     

Impacted Files	Coverage Δ
proto/col_date32_gen.go	100.00% <ø> (ø)
proto/col_date_gen.go	100.00% <ø> (ø)
proto/col_datetime64_gen.go	100.00% <ø> (ø)
proto/col_datetime_gen.go	100.00% <ø> (ø)
proto/col_decimal128_gen.go	100.00% <ø> (ø)
proto/col_decimal256_gen.go	100.00% <ø> (ø)
proto/col_decimal32_gen.go	100.00% <ø> (ø)
proto/col_decimal64_gen.go	100.00% <ø> (ø)
proto/col_enum16_gen.go	100.00% <ø> (ø)
proto/col_enum8_gen.go	100.00% <ø> (ø)
... and 43 more

---

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[ernado]

name                           old time/op    new time/op     delta
ColBool_Raw_DecodeColumn-32      1.82µs ± 2%     1.82µs ± 2%       ~     (p=0.587 n=5+5)
ColBool_DecodeColumn-32          23.2µs ± 1%     23.8µs ± 1%     +2.77%  (p=0.008 n=5+5)
ColDate32_DecodeColumn-32         737ns ± 4%       73ns ± 1%    -90.07%  (p=0.008 n=5+5)
ColDate_DecodeColumn-32           712ns ± 3%       47ns ± 6%    -93.37%  (p=0.008 n=5+5)
ColDateTime64_DecodeColumn-32     790ns ± 2%      128ns ± 3%    -83.78%  (p=0.008 n=5+5)
ColDateTime_DecodeColumn-32       730ns ± 2%       73ns ± 1%    -89.98%  (p=0.008 n=5+5)
ColDecimal128_DecodeColumn-32    2.52µs ± 2%     2.54µs ± 2%       ~     (p=0.421 n=5+5)
ColDecimal256_DecodeColumn-32    3.61µs ± 1%     3.62µs ± 1%       ~     (p=0.452 n=5+5)
ColDecimal32_DecodeColumn-32      732ns ± 1%       72ns ± 1%    -90.13%  (p=0.008 n=5+5)
ColDecimal64_DecodeColumn-32      795ns ± 2%      128ns ± 1%    -83.86%  (p=0.008 n=5+5)
ColEnum16_DecodeColumn-32         704ns ± 2%       46ns ± 2%    -93.42%  (p=0.008 n=5+5)
ColEnum8_DecodeColumn-32          273ns ± 2%       42ns ± 3%    -84.52%  (p=0.008 n=5+5)
ColFixedStr_DecodeColumn-32       707ns ± 2%      699ns ± 1%       ~     (p=0.151 n=5+5)
ColFloat32_DecodeColumn-32        733ns ± 1%       74ns ± 3%    -89.95%  (p=0.008 n=5+5)
ColFloat64_DecodeColumn-32        795ns ± 3%      128ns ± 1%    -83.86%  (p=0.008 n=5+5)
ColInt128_DecodeColumn-32        2.56µs ± 2%     2.54µs ± 2%       ~     (p=0.151 n=5+5)
ColInt16_DecodeColumn-32          711ns ± 4%       46ns ± 1%    -93.47%  (p=0.008 n=5+5)
ColInt256_DecodeColumn-32        3.61µs ± 2%     3.61µs ± 1%       ~     (p=0.841 n=5+5)
ColInt32_DecodeColumn-32          735ns ± 1%       73ns ± 0%    -90.09%  (p=0.016 n=5+4)
ColInt64_DecodeColumn-32          783ns ± 1%      128ns ± 1%    -83.70%  (p=0.008 n=5+5)
ColInt8_DecodeColumn-32           279ns ± 2%       42ns ± 1%    -84.96%  (p=0.008 n=5+5)
ColIPv4_DecodeColumn-32           731ns ± 2%       73ns ± 1%    -90.05%  (p=0.008 n=5+5)
ColIPv6_DecodeColumn-32          2.52µs ± 2%     2.53µs ± 1%       ~     (p=0.548 n=5+5)
ColRaw_DecodeColumn-32           1.40µs ± 1%     1.42µs ± 1%     +1.67%  (p=0.024 n=5+5)
ColStr_DecodeColumn-32           30.7µs ± 2%     31.1µs ± 1%       ~     (p=0.095 n=5+5)
ColTuple_DecodeColumn-32         5.76µs ± 3%     5.78µs ± 1%       ~     (p=0.548 n=5+5)
ColUInt128_DecodeColumn-32       2.52µs ± 2%     2.54µs ± 2%       ~     (p=0.421 n=5+5)
ColUInt16_DecodeColumn-32         707ns ± 3%       47ns ± 1%    -93.38%  (p=0.008 n=5+5)
ColUInt256_DecodeColumn-32       3.57µs ± 1%     3.59µs ± 2%       ~     (p=0.548 n=5+5)
ColUInt32_DecodeColumn-32         726ns ± 2%       72ns ± 1%    -90.08%  (p=0.008 n=5+5)
ColUInt64_DecodeColumn-32         776ns ± 1%      127ns ± 1%    -83.58%  (p=0.008 n=5+5)
ColUInt8_DecodeColumn-32         52.5ns ± 1%     52.9ns ± 2%       ~     (p=0.794 n=5+5)
ColUUID_DecodeColumn-32          64.2µs ± 2%     63.7µs ± 3%       ~     (p=0.841 n=5+5)
ServerHello_Decode/Struct-32      467ns ± 3%      477ns ± 2%       ~     (p=0.056 n=5+5)
ServerHello_Decode/Raw-32         181ns ± 3%      185ns ± 2%       ~     (p=0.111 n=5+5)

name                           old speed      new speed       delta
ColBool_Raw_DecodeColumn-32    27.4GB/s ± 2%   27.5GB/s ± 2%       ~     (p=0.690 n=5+5)
ColBool_DecodeColumn-32        2.16GB/s ± 1%   2.10GB/s ± 1%     -2.71%  (p=0.008 n=5+5)
ColDate32_DecodeColumn-32      5.43GB/s ± 4%  54.61GB/s ± 1%   +906.39%  (p=0.008 n=5+5)
ColDate_DecodeColumn-32        2.81GB/s ± 3%  42.37GB/s ± 5%  +1408.60%  (p=0.008 n=5+5)
ColDateTime64_DecodeColumn-32  10.1GB/s ± 2%   62.5GB/s ± 3%   +516.87%  (p=0.008 n=5+5)
ColDateTime_DecodeColumn-32    5.48GB/s ± 2%  54.70GB/s ± 2%   +898.17%  (p=0.008 n=5+5)
ColDecimal128_DecodeColumn-32  6.34GB/s ± 1%   6.31GB/s ± 2%       ~     (p=0.421 n=5+5)
ColDecimal256_DecodeColumn-32  8.87GB/s ± 1%   8.84GB/s ± 1%       ~     (p=0.421 n=5+5)
ColDecimal32_DecodeColumn-32   5.46GB/s ± 1%  55.38GB/s ± 1%   +913.64%  (p=0.008 n=5+5)
ColDecimal64_DecodeColumn-32   10.1GB/s ± 2%   62.4GB/s ± 1%   +519.66%  (p=0.008 n=5+5)
ColEnum16_DecodeColumn-32      2.84GB/s ± 2%  43.19GB/s ± 2%  +1418.91%  (p=0.008 n=5+5)
ColEnum8_DecodeColumn-32       3.67GB/s ± 2%  23.70GB/s ± 3%   +545.90%  (p=0.008 n=5+5)
ColFixedStr_DecodeColumn-32    45.2GB/s ± 2%   45.8GB/s ± 1%       ~     (p=0.151 n=5+5)
ColFloat32_DecodeColumn-32     5.46GB/s ± 1%  54.36GB/s ± 3%   +895.62%  (p=0.008 n=5+5)
ColFloat64_DecodeColumn-32     10.1GB/s ± 3%   62.4GB/s ± 1%   +519.55%  (p=0.008 n=5+5)
ColInt128_DecodeColumn-32      6.24GB/s ± 2%   6.30GB/s ± 2%       ~     (p=0.151 n=5+5)
ColInt16_DecodeColumn-32       2.81GB/s ± 4%  43.06GB/s ± 1%  +1430.74%  (p=0.008 n=5+5)
ColInt256_DecodeColumn-32      8.86GB/s ± 2%   8.87GB/s ± 1%       ~     (p=0.841 n=5+5)
ColInt32_DecodeColumn-32       5.45GB/s ± 1%  54.94GB/s ± 0%   +908.90%  (p=0.016 n=5+4)
ColInt64_DecodeColumn-32       10.2GB/s ± 1%   62.7GB/s ± 1%   +513.74%  (p=0.008 n=5+5)
ColInt8_DecodeColumn-32        3.58GB/s ± 2%  23.82GB/s ± 1%   +564.77%  (p=0.008 n=5+5)
ColIPv4_DecodeColumn-32        5.47GB/s ± 2%  55.01GB/s ± 1%   +905.24%  (p=0.008 n=5+5)
ColIPv6_DecodeColumn-32        6.35GB/s ± 2%   6.31GB/s ± 1%       ~     (p=0.548 n=5+5)
ColRaw_DecodeColumn-32         45.8GB/s ± 1%   45.1GB/s ± 1%     -1.64%  (p=0.032 n=5+5)
ColStr_DecodeColumn-32         1.07GB/s ± 2%   1.06GB/s ± 1%       ~     (p=0.095 n=5+5)
ColTuple_DecodeColumn-32       26.1GB/s ± 3%   26.0GB/s ± 1%       ~     (p=0.548 n=5+5)
ColUInt128_DecodeColumn-32     6.35GB/s ± 2%   6.30GB/s ± 2%       ~     (p=0.421 n=5+5)
ColUInt16_DecodeColumn-32      2.83GB/s ± 3%  42.73GB/s ± 1%  +1410.63%  (p=0.008 n=5+5)
ColUInt256_DecodeColumn-32     8.96GB/s ± 1%   8.92GB/s ± 2%       ~     (p=0.548 n=5+5)
ColUInt32_DecodeColumn-32      5.51GB/s ± 2%  55.51GB/s ± 1%   +907.76%  (p=0.008 n=5+5)
ColUInt64_DecodeColumn-32      10.3GB/s ± 1%   62.8GB/s ± 1%   +509.07%  (p=0.008 n=5+5)
ColUInt8_DecodeColumn-32       19.0GB/s ± 1%   18.9GB/s ± 2%       ~     (p=0.841 n=5+5)
ColUUID_DecodeColumn-32        12.5GB/s ± 2%   12.6GB/s ± 3%       ~     (p=0.841 n=5+5)
ServerHello_Decode/Struct-32   94.2MB/s ± 4%   92.2MB/s ± 2%       ~     (p=0.056 n=5+5)
ServerHello_Decode/Raw-32       243MB/s ± 2%    238MB/s ± 2%       ~     (p=0.095 n=5+5)