Run results for: kahjsdhjkasghjkdkaghsdghasd

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0

Browser: Firefox 108

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
encode	88495190.0 Ops/sec
decode	91277820.0 Ops/sec

Script Preparation code:

const alphabet = { 'a': '$', 'b': '?'}

Tests:

encode
encode = text => text.split('').map(ch => alphabet[ch]).join('');
decode
decode = text => text.split('').map(ch => Object.keys(alphabet).find(letter => alphabet[letter] === ch)).join('');