According to Jeff Dean on Twitter, the public version of Google's AI performance hints is a sanitized edition, while employees have access to a more detailed internal version via go/performance-hints, which includes direct links to the changelist in Google's source code repository (source: @JeffDean, Dec 19, 2025). This distinction highlights Google's internal commitment to transparency and continuous AI system optimization. For AI businesses and developers, understanding that major tech companies maintain advanced, internal-only optimization tools signals a persistent competitive edge and the importance of developing proprietary AI performance monitoring solutions to stay competitive.