Cache read / write speedup

[sounisi5011]

Cache data is stored in files using flat-cache.

https://github.com/sounisi5011/metalsmith-netlify-published-date/blob/74136db05065dbf5e97c89d45d3cdcc498acd37c/src/cache/preview.ts

The format of the cache data is JSON. For this reason, special conversion processing is performed to store Buffer in JSON. This is a problem caused by using JSON, and is a useless conversion.

Also, since all cache data needs to be parsed, the processing speed will be reduced if the cache becomes too large.

There are two problems to solve:

• Change to cache data format that can store Buffer directly (e.g. BSON, MessagePack, Protocol Buffers, FlatBuffers and Cap’n Proto)
• Change to a cache data format that does not parse all data (e.g. FlatBuffers and Cap’n Proto)

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References:

• 汎用シリアライズ方法(MessagePack/Protocol Buffers/FlatBuffers) - sambaiz-net
• neue cc - ZeroFormatter - C#の最速かつ無限大高速な .NET, .NET Core, Unity用シリアライザー