Router execution results in a heavily fragmented heap, that is hard to manage for the default allocator. jemallocator handles it better, which results in performance improvements, in latency and memory usage

There's a cost in using the `Context` structure throughout a request's lifecycle, due to the JSON serialization and deserialization, so it should be reserved from inter plugin communication between rhai, coprocessor and Rust. But for internal router usage, we can have a more efficient structure that avoids serialization costs, and does not expose data that should not be modified by plugins.

That structure is based on a map indexed by type id, which means that if some part of the code can see that type, then it can access it in the map.

This means that some context data that was accessible from rhai and all plugins, is now inaccessible

Response formatting generates a lot of temporary allocations to create response paths that end up unused. By making a reference based type to hold these paths, we can prevent those allocations and improve performance.

The in memory cache requires synchronization, and precedently we used a
futures aware mutex for that, but those are susceptible to contention.
This replaces that mutex with a parking-lot synchronous mutex that is
much faster.

---------

Co-authored-by: Gary Pennington <gary@apollographql.com>

we do not show span attributes in our logs, but the log formatter still
spends some time formatting them to a string, even when there will be no
logs written for the trace. This adds the `NullFieldFormatter` that
entirely avoids formatting the attributes

Follow-up to the v1.15.1 being officially released, bringing version
bumps and changelog updates into the `dev` branch.

This is a small performance improvement.

When the `Accept` is not present, the previous code would still traverse
the header map three times.

When a batch span exporter is unable to send accept a span because the
buffer is full it will emit an error.
These errors can be very frequent and could potentially impact
performance.

Otel errors are not rate limited to one every ten seconds per error
type.

Fixes #2953

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Complete the checklist (and note appropriate exceptions) before a final
PR is raised.

- [ ] Changes are compatible[^1]
- [ ] Documentation[^2] completed
- [ ] Performance impact assessed and acceptable
- Tests added and passing[^3]
    - [x] Unit Tests
    - [ ] Integration Tests
    - [ ] Manual Tests

**Exceptions**

*Note any exceptions here*

**Notes**

[^1]. It may be appropriate to bring upcoming changes to the attention
of other (impacted) groups. Please endeavour to do this before seeking
PR approval. The mechanism for doing this will vary considerably, so use
your judgement as to how and when to do this.
[^2]. Configuration is an important part of many changes. Where
applicable please try to document configuration examples.
[^3]. Tick whichever testing boxes are applicable. If you are adding
Manual Tests:
- please document the manual testing (extensively) in the Exceptions.
- please raise a separate issue to automate the test and label it (or
ask for it to be labeled) as `manual test`

---------

Co-authored-by: bryn <bryn@apollographql.com>

add support of operationCountByType for apollo studio

---------

Signed-off-by: Benjamin Coenen <5719034+bnjjj@users.noreply.github.com>

The context requires synchronized access to the busy timer, and
precedently we used a futures aware mutex for that, but those are
susceptible to contention. This replaces that mutex with a parking-lot
synchronous mutex that is much faster.

…ttp2 (#2976)

Fix a bug where `experimental_enable_http2` wouldn't properly apply when
a global configuration was set.

Currently, if a rhai script errors in rhai, the rhai plugin ignores the
error and returns None in the stream of results.

This has two unfortunate aspects:
 - the error is not propagated to the client
 - the stream is terminated (silently)

The fix captures the error and propagates the response to the client.

Fixes #2935 #2936 

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- [x] Changes are compatible[^1]
- [x] Documentation[^2] completed
- [x] Performance impact assessed and acceptable
- Tests added and passing[^3]
    - [x] Unit Tests
    ~- [ ] Integration Tests~
    - [x] Manual Tests

**Exceptions**

*Note any exceptions here*

**Notes**

[^1]. It may be appropriate to bring upcoming changes to the attention
of other (impacted) groups. Please endeavour to do this before seeking
PR approval. The mechanism for doing this will vary considerably, so use
your judgement as to how and when to do this.
[^2]. Configuration is an important part of many changes. Where
applicable please try to document configuration examples.
[^3]. Tick whichever testing boxes are applicable. If you are adding
Manual Tests:
- please document the manual testing (extensively) in the Exceptions.
- please raise a separate issue to automate the test and label it (or
ask for it to be labeled) as `manual test`

Partially fixes https://rustsec.org/advisories/RUSTSEC-2021-0139

`clap` is still depending on
[ansi_term](https://github.com/ogham/rust-ansi-term).

cargo audit before the change:
```
Crate:     ansi_term
Version:   0.12.1
Warning:   unmaintained
Title:     ansi_term is Unmaintained
Date:      2021-08-18
ID:        RUSTSEC-2021-0139
URL:       https://rustsec.org/advisories/RUSTSEC-2021-0139
Dependency tree:
ansi_term 0.12.1
├── clap 2.34.0
│   ├── structopt 0.3.26
│   │   └── cargo-scaffold 0.8.7
│   │       └── apollo-router-scaffold 1.12.1
│   └── cargo-scaffold 0.8.7
└── apollo-router 1.12.1
    ├── throw-error 0.1.0
    ├── supergraph_sdl 0.1.0
    ├── rhai-surrogate-cache-key 0.1.0
    ├── rhai-subgraph-request-log 0.1.0
    ├── rhai-logging 0.1.0
    ├── rhai-error-response-mutate 0.1.0
    ├── rhai-data-response-mutate 0.1.0
    ├── propagate-status-code 0.1.0
    ├── op-name-to-header 0.1.0
    ├── jwt-claims 0.1.0
    ├── hello-world 0.1.0
    ├── forbid_anonymous_operations_rhai 0.1.0
    ├── forbid-anonymous-operations 0.1.0
    ├── external-subgraph 0.1.0
    ├── cookies-to-headers 0.1.0
    ├── context-data 0.1.0
    ├── async-allow-client-id 0.1.0
    ├── apollo-router-benchmarks 1.12.1
    └── add-timestamp-header 0.1.0
```

cargo audit after the change:
```
Crate:     ansi_term
Version:   0.12.1
Warning:   unmaintained
Title:     ansi_term is Unmaintained
Date:      2021-08-18
ID:        RUSTSEC-2021-0139
URL:       https://rustsec.org/advisories/RUSTSEC-2021-0139
Dependency tree:
ansi_term 0.12.1
└── clap 2.34.0
    ├── structopt 0.3.26
    │   └── cargo-scaffold 0.8.7
    │       └── apollo-router-scaffold 1.12.1
    └── cargo-scaffold 0.8.7
```

Co-authored-by: Coenen Benjamin <benjamin.coenen@hotmail.com>

This reverts commit c0218a3.

Fixes https://rustsec.org/advisories/RUSTSEC-2023-0034

so this will be measured by CI benchmarks and serve as baseline for
upcoming changes

This integrates the encoders from
https://github.com/Nemo157/async-compression so we can use them other a
stream that flushes data regularly

this makes an assumption that async-commpression cannot make: every
chunk in the body stream has to be compressed and flushed directly, we
should not wait for more data to come and get better compression.
This is due to the multipart protocol for defer: we know each chunk
represent eitehr the primary or a deferred response, and should be sent
as soon as possible

Reverts #2989

…eleases (#3004)

This changes our script to be explicit and pass the `--prerelease`
version
to our increasingly automated release pipeline when the `-` character is
detected in the "version" property of the release being published.

Typically, GitHub marks "latest" versions "based on semver"[1], but
GitHub
still marks "pre-release versions" (as defined by Semver 2.0 [2]) as
"latest" irregardless of that meaning to semver.

This seems a bit unexpected, but it is the way it is, so we'll account
for
it by making sure we're explicit.

[1]:
https://docs.github.com/en/repositories/releasing-projects-on-github/managing-releases-in-a-repository#:~:text=the%20latest%20release%20label%20will%20automatically%20be%20assigned%20based%20on%20semantic%20versioning
[2]: https://semver.org/#spec-item-9

Follows-up: #3003 (root-cause)

---------

Co-authored-by: Jeremy Lempereur <jeremy.lempereur@iomentum.com>

improved error message for missing query string in GET request, to
address issue #2941
Fixes #2941

Co-authored-by: Jesse Rosenberger <git@jro.cc>

We replace tower-http's `CompressionLayer` with a custom stream transformation. This is necessary because tower-http uses async-compression, which buffers data until the end of the stream to then write it, ensuring a better compression. This is incompatible with the multipart protocol for `@defer`, which requires chunks to be sent as soon as possible. So we need to compress them independently.

This extracts parts of the codec module of async-compression, which so far is not public, and makes a streaming wrapper above it that flushes the compressed data on every response in the stream.

This is expected to be temporary, as we have in flight PRs for async-compression:
- Nullus157/async-compression#155
- Nullus157/async-compression#178

With Nullus157/async-compression#150 we might be able to at least remove the vendored code

…3006)

Signed-off-by: Benjamin Coenen <5719034+bnjjj@users.noreply.github.com>

The Router can now artificially be made to hot-reload (as if the
configuration or schema had changed) at a configured time interval. This
can help reproduce issues like reload-related memory leaks.

The new configuration section for chaos testing is marked as
experimental.

<!-- start metadata -->

**Checklist**

Complete the checklist (and note appropriate exceptions) before a final
PR is raised.

- [ ] Changes are compatible[^1]
- [ ] Documentation[^2] completed
- [ ] Performance impact assessed and acceptable
- Tests added and passing[^3]
    - [ ] Unit Tests
    - [ ] Integration Tests
    - [ ] Manual Tests

**Exceptions**

*Note any exceptions here*

**Notes**

[^1]. It may be appropriate to bring upcoming changes to the attention
of other (impacted) groups. Please endeavour to do this before seeking
PR approval. The mechanism for doing this will vary considerably, so use
your judgement as to how and when to do this.
[^2]. Configuration is an important part of many changes. Where
applicable please try to document configuration examples.
[^3]. Tick whichever testing boxes are applicable. If you are adding
Manual Tests:
- please document the manual testing (extensively) in the Exceptions.
- please raise a separate issue to automate the test and label it (or
ask for it to be labeled) as `manual test`

---------

Co-authored-by: Bryn Cooke <BrynCooke@gmail.com>

The Rhai logging output was "standardized" about a year ago. Since that
time, significant efforts have been made within the rest of the router
to standardize on a slightly different format. This PR brings rhai log
output into line with the rest of the router.

It also addresses the requirement to make the "message" output
specifiable by the script author.

Note: The changes are source code compatible, but the format of the
output log line is changing. I don't think we make compatibility
commitments on this, but it's worth noting.

Fixes #2777 

<!-- start metadata -->

**Checklist**

Complete the checklist (and note appropriate exceptions) before a final
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- [ ] Changes are compatible[^1]
- [x] Documentation[^2] completed
- [x] Performance impact assessed and acceptable
- Tests added and passing[^3]
    - [x] Unit Tests
    - [x] Integration Tests
    - [ ] Manual Tests

**Exceptions**

*Note any exceptions here*

**Notes**

[^1]. It may be appropriate to bring upcoming changes to the attention
of other (impacted) groups. Please endeavour to do this before seeking
PR approval. The mechanism for doing this will vary considerably, so use
your judgement as to how and when to do this.
[^2]. Configuration is an important part of many changes. Where
applicable please try to document configuration examples.
[^3]. Tick whichever testing boxes are applicable. If you are adding
Manual Tests:
- please document the manual testing (extensively) in the Exceptions.
- please raise a separate issue to automate the test and label it (or
ask for it to be labeled) as `manual test`

…es (#2960)

This expands on the existing mechanism that was originally introduced in
#2242, which supports the
notion of an "experimental" feature, and make it compatible with the
notion of "preview" features.

**Checklist**

Complete the checklist (and note appropriate exceptions) before a final
PR is raised.

- [x] Changes are compatible[^1]
- [x] Documentation[^2] completed
- [-] Performance impact assessed and acceptable
- Tests added and passing[^3]
    - [-] Unit Tests
    - [x] Integration Tests
    - [x] Manual Tests

---------

Co-authored-by: o0Ignition0o <jeremy.lempereur@gmail.com>
Co-authored-by: Simon Sapin <simon@apollographql.com>

This (hopefully) helps clarify that this docset is specific to
self-hosting the router as opposed to managing cloud routing via
GraphOS.

…ages to studio (#3011)

When using subgraphs which are enabled with [Apollo Federated
Tracing](https://www.apollographql.com/docs/router/configuration/apollo-telemetry/#enabling-field-level-instrumentation),
the error messages within those traces will be **redacted by default**.

New configuration (`tracing.apollo.errors.subgraph.all.redact`, which
defaults to `true`) enables and disables the redaction mechanism.
Similar configuration (`tracing.apollo.errors.subgraph.all.send`, which
also defaults to `true`) enables and disables the entire transmission of
the error to Studio.

The error messages returned to the clients are **not** changed or
redacted from their previous behavior.

To enable sending subgraph's federated trace error messages to Studio
**without redaction**, you can set the following configuration:

```yaml title="router.yaml"
telemetry:
  apollo:
    errors:
      subgraph:
        all:
          send: true # (true = Send to Studio, false = Do not send; default: true)
          redact: false # (true = Redact full error message, false = Do not redact; default: true)
```

It is also possible to configure this **per-subgraph** using a
`subgraphs` map at the same level as `all` in the configuration, much
like other sections of the configuration which have subgraph-specific
capabilities:

```yaml title="router.yaml"
telemetry:
  apollo:
    errors:
      subgraph:
        all:
          send: true
          redact: false # Disable redaction as a default.  The `accounts` service enables it below.
        subgraphs:
          accounts: # Applies to the `accounts` subgraph, overriding the `all` global setting.
            redact: true # Redact messages from the `accounts` service.
```

By [@bnjjj](https://github.com/bnjjj) in
#3011

---------

Signed-off-by: Benjamin Coenen <5719034+bnjjj@users.noreply.github.com>
Co-authored-by: Jesse Rosenberger <git@jro.cc>
Co-authored-by: Bryn Cooke <BrynCooke@gmail.com>

To bring in Federation v2.4.2 query planner: https://github.com/apollographql/federation/releases/tag/%40apollo%2Fquery-planner%402.4.2