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Optimise row parser to delay sub-binary creation #192

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Optimise row parser to delay sub-binary creation #192

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20 changes: 10 additions & 10 deletions lib/mariaex/row_parser.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -306,50 +306,50 @@ defmodule Mariaex.RowParser do
Enum.reverse(acc)
end

defp decode_text_rows(string, rest, [:string | fields], acc) do
defp decode_text_rows(string, << rest::bits >>, [:string | fields], acc) do
decode_text_part(rest, fields, [string | acc])
end

defp decode_text_rows(string, rest, [type | fields], acc)
defp decode_text_rows(string, << rest::bits >>, [type | fields], acc)
when type in [:uint8, :int8, :uint16, :int16, :uint32, :int32, :uint64, :int64] do
decode_text_part(rest, fields, [:erlang.binary_to_integer(string) | acc])
end

defp decode_text_rows(string, rest, [type | fields], acc)
defp decode_text_rows(string, << rest::bits >>, [type | fields], acc)
when type in [:float32, :float64, :decimal] do
decode_text_part(rest, fields, [:erlang.binary_to_float(string) | acc])
end

defp decode_text_rows(string, rest, [:bit | fields], acc) do
defp decode_text_rows(string, << rest::bits >>, [:bit | fields], acc) do
decode_text_part(rest, fields, [string | acc])
end

defp decode_text_rows(string, rest, [:time | fields], acc) do
defp decode_text_rows(string, << rest::bits >>, [:time | fields], acc) do
decode_text_time(string, rest, fields, acc)
end

defp decode_text_rows(string, rest, [:date | fields], acc) do
defp decode_text_rows(string, << rest::bits >>, [:date | fields], acc) do
decode_text_date(string, rest, fields, acc)
end

defp decode_text_rows(string, rest, [:datetime | fields], acc) do
defp decode_text_rows(string, << rest::bits >>, [:datetime | fields], acc) do
decode_text_datetime(string, rest, fields, acc)
end

defmacrop to_int(value) do
quote do: :erlang.binary_to_integer(unquote(value))
end

defp decode_text_date(<<year::4-bytes, ?-, month::2-bytes, ?-, day::2-bytes>>, rest, fields, acc) do
defp decode_text_date(<<year::4-bytes, ?-, month::2-bytes, ?-, day::2-bytes>>, << rest::bits >>, fields, acc) do
decode_text_part(rest, fields, [{to_int(year), to_int(month), to_int(day)} | acc])
end

defp decode_text_time(<<hour::2-bytes, ?:, min::2-bytes, ?:, sec::2-bytes>>, rest, fields, acc) do
defp decode_text_time(<<hour::2-bytes, ?:, min::2-bytes, ?:, sec::2-bytes>>, << rest::bits >>, fields, acc) do
decode_text_part(rest, fields, [{to_int(hour), to_int(min), to_int(sec), 0} | acc])
end

defp decode_text_datetime(<<year::4-bytes, ?-, month::2-bytes, ?-, day::2-bytes,
_::8-little, hour::2-bytes, ?:, min::2-bytes, ?:, sec::2-bytes>>, rest, fields, acc) do
_::8-little, hour::2-bytes, ?:, min::2-bytes, ?:, sec::2-bytes>>, << rest::bits >>, fields, acc) do
decode_text_part(rest, fields, [{{to_int(year), to_int(month), to_int(day)}, {to_int(hour), to_int(min), to_int(sec), 0}} | acc])
end
end