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memory for no reason (#397)
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- **EXPERIMENTAL** `zen builds`
- Feature: `--zen-cache-host` option for `upload` and `download` operations to use a zenserver host `/builds` endpoint for storing build blob and blob metadata
- Feature: New `/builds` endpoint for caching build blobs and blob metadata
- `/builds/{namespace}/{bucket}/{buildid}/blobs/{hash}` `GET` and `PUT` method for storing and fetching blobs
- `/builds/{namespace}/{bucket}/{buildid}/blobs/putBlobMetadata` `POST` method for storing metadata about blobs
- `/builds/{namespace}/{bucket}/{buildid}/blobs/getBlobMetadata` `POST` method for fetching metadata about blobs
- `/builds/{namespace}/{bucket}/{buildid}/blobs/exists` `POST` method for checking existance of blobs
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This change introduces support for tracing of memory allocation activity. The code is ported from UE5, and Unreal Insights can be used to analyze the output. This is currently only fully supported on Windows, but will be extended to Mac/Linux in the near future.
To activate full memory tracking, pass `--trace=memory` on the commandline alongside `--tracehost=<ip>` or `-tracefile=<path>`. For more control over how much detail is traced you can instead pass some combination of `callstack`, `memtag`, `memalloc` instead. In practice, `--trace=memory` is an alias for `--trace=callstack,memtag,memalloc`). For convenience we also support `--trace=memory_light` which omits call stacks.
This change also introduces multiple memory allocators, which may be selected via command-line option `--malloc=<allocator>`:
* `mimalloc` - mimalloc (default, same as before)
* `rpmalloc` - rpmalloc is another high performance allocator for multithreaded applications which may be a better option than mimalloc (to be evaluated). Due to toolchain limitations this is currently only supported on Windows.
* `stomp` - an allocator intended to be used during development/debugging to help track down memory issues such as use-after-free or out-of-bounds access. Currently only supported on Windows.
* `ansi` - fallback to default system allocator
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- Improvement: Add zenhttp-test and zenutil-test
- Improvement: Moved cachepolicy test to cachepolicy.cpp
- Improvement: Renamed cachestore tests from z$ to cachestore
- Improvement: Moved test linking so test for a lib is linked by <lib>-test
- Improvement: Removed HttpRequestParseRelativeUri in httpstructuredcache.cpp and use the one in cacherequests.h instead
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* move structuredcachestore tests to zenstore-test
* Don't materialize entire files when hashing if it is a large files
* rewrite CompositeBuffer::Mid to never materialize buffers
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the previous implementation of in-memory index snapshots serialise data to memory before writing to disk and vice versa when reading. This leads to some memory spikes which end up pushing useful data out of system cache and also cause stalls on I/O operations.
this change moves more code to a streaming serialisation approach which scales better from a memory usage perspective and also performs much better
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* moved source directories into `/src`
* updated bundle.lua for new `src` path
* moved some docs, icon
* removed old test trees
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