next.js

f3a6889e - Turbopack: split meta data and AQMF into separate files (#79659)

Turbopack: split meta data and AQMF into separate files (#79659) ### What? Split the SST meta data and AQMF into a separate `*.meta` file. A single meta file can contain meta data and AQMFs of multiple SST files. On database startup only the meta data files need to be read and SST files are lazily mmapped and read only when the AQM-Filter is successful. This ensures that only SST files with a high likelyhood need to be read at all. Currently this has not much benefit as keys are randomly distributed in SST files, so all files need to be read anyway. There is a small benefit after a bunch of incremental builds, when some SST files become unused as they have been overwritten. In future we want to split keys into recently used and not recently used keys and place them in separate SST files. This ensures that less SST files need to be read. This change is a pre-requirement to that change.