Revert "experiment with a bool lookup table for strings"
Revert "experiment with a bool lookup table for strings"

This reverts commit c7b300959716381d5348ae8396e511d6d85b289b.

xiuzhifu/ffjson,cw2018/ffjson,xladykiller/ffjson,xladykiller/ffjson,trigrass2/ffjson,jamesliu96/ffjson,trigrass2/ffjson,xyliuke/ffjson,jamesliu96/ffjson,sunminghong/ffjson,sunminghong/ffjson,pquerna/ffjson,xiuzhifu/ffjson,pquerna/ffjson,cmeon/ffjson,xyliuke/ffjson,cmeon/ffjson,cw2018/ffjson