added performance fix for unicode package
added performance fix for unicode package

gopherjs/gopherjs,gopherjs/gopherjs,roth1002/gopherjs,jargv/gopherjs,rasata/gopherjs,jeremyschlatter/gopherjs,jeremyschlatter/gopherjs,bpowers/gopherjs,ebroder/gopherjs,govlas/gopherjs,jeremyschlatter/gopherjs,gopherjs/gopherjs,albrow/gopherjs,bpowers/gopherjs,jargv/gopherjs,gopherjs/gopherjs,ebroder/gopherjs,flimzy/gopherjs,nmfzone/gopherjs,albrow/gopherjs,ebroder/gopherjs,rasata/gopherjs,Yanjing123/gopherjs,Yanjing123/gopherjs,rasata/gopherjs,albrow/gopherjs,bpowers/gopherjs,Archs/gopherjs,roth1002/gopherjs,Archs/gopherjs,jargv/gopherjs,govlas/gopherjs,flimzy/gopherjs,roth1002/gopherjs,Archs/gopherjs,Yanjing123/gopherjs,gopherjs/gopherjs,nmfzone/gopherjs,nmfzone/gopherjs,govlas/gopherjs,flimzy/gopherjs