Profiling `zig build --release=fast` after a one-file edit showed the
cost was three parallel exe compiles of the same module — each re-runs
LLVM codegen when anything in `lightpanda_module` changes. All C/C++
deps (v8, sqlite, curl, brotli, nghttp2, boringssl) already cache across
builds and are not the bottleneck.
Default install now builds only the main `lightpanda` exe.
`lightpanda-snapshot-creator` and `legacy_test` move to a new named step
and can be built explicitly via `zig build extras`. CI is unaffected:
nightly.yml already invokes `snapshot_creator` as an explicit step, and
no job consumes the legacy_test artifact.
Measured (release=fast, one source file modified, 36/36 steps):
before: real 3m32s, compile exe lightpanda ~3m, others ~2m each
after: real 2m43s, only compile exe lightpanda
Also tried and rejected:
- self-hosted Zig backend for Debug: fatal linker error, unhandled
relocation type R_X86_64_PC64 in V8 objects.
- mold via `mold -run`: ~4s delta, within noise — Zig invokes LLD
as a library, so no external `ld` process exists to intercept.
This adds an app.storage which is a union around configurable storage engine
(currently, only sqlite).
It is _not_ being used anywhere right now. The goal is to get feedback on
the implementation and then move cache to it.
This doesn't expose a generic query API. The goal is that the storage will
expose high level methods, e.g. `cacheGet(req: CacheGetRequest)` and every
storage engine will translate the `storage.CacheGetRequest` as needed.
A thin wrapper around the Sqlite C api is included, e.g. exec(SQL, .{args}) a
`rows` and `row` fetcher. A connection pool is included. By default, an
in-memory DB is currently created. And a `migrations` table with an id of `1`
is created/inserted. I don't imagine needing fancy migratations.
Some WPT tests need to interact with the browser in a way that isn't possible
with web apis. Browsers need to expose a way for tests to do this and then use
the testdriver-vendor.js to hook into these special WPT actions.
This commit sets up the infrastructure for supporting this and includes
the delete_all_cookies functionality needed by various cookie tests (e.g.
/cookies/attributes/attributes-ctl.sub.html).
A new compilation flag, `-Dwpt_extensions`, can be specified. When specified
a `window.webdriver` accessor is defined and a `WebDriver` type is exposed.
Note that, while I only implemented delete_all_cookies for now, I've seen other
tests fail because of missing vendor-specific implementation.
Uses libcurl's websocket capabilities to add support for WebSocket.
Depends on https://github.com/lightpanda-io/zig-v8-fork/pull/167
Issue: https://github.com/lightpanda-io/browser/issues/1952
This is a WIP because it currently uses the same connection pool used for all
HTTP requests. It would be pretty easy for a page to starve the pool and block
any progress.
We previously stored the *Transfer inside of the easy's private data. We now
store the *Connection, and a Connection now has a `transport` field which is
a union for `http: *Transfer` or `websocket: *Websocket`.
Removes manual git flags from CI and build scripts.
Versioning is now automatically derived from git and build.zig.zon.
With this PR, we follow https://semver.org/
Logic:
1. Read the version from build.zig.zon
2. If it doesn't have a `.pre` field (i.e. dev/alpha/beta) it will use that
3. Otherwise it will get the info from git: hash and number of commits since last `.0` version
4. Then build the version: `0.3.0-dev.1493+0896edc3`
Note that, since the latest stable version is `0.2.6`.
The convention is to use `0.3.0-dev`, as:
- `0.2.6` < `0.3.0.dev` < `0.3.0`
- Add git_version option to build.zig (similar to git_commit)
- Update version command to output git_version when available
- Falls back to git_commit when not on a tagged release
- CI can pass -Dgit_version=$(git describe --tags --exact-match) for releases
Fixes#1867
This adds a crash handler which reports a crash (if telemetry is enabled). On a
crash, this looks for `curl` (using the PATH env), and forks the process to then
call execve. This relies on a new endpoint to be setup to accept the "report".
Also, we include very little data..I figured just knowing about crashes would
be a good place to start.
A panic handler is provided, which override's Zig default handler and hooks
into the crash handler.
An `assert` function is added and hooks into the crash handler. This is
currently only used in one place (Session.zig) to demonstrate its use. In
addition to reporting a failed assert, the assert aborts execution in
ReleaseFast (as opposed to an undefined behavior with std.debug.assert).
I want to hook this into the v8 global error handler, but only after direct_v8
is merged.
Much of this is inspired by bun's code. They have their own assert (1) and
a [more sophisticated] crashHandler (2).
:
(1) beccd01647/src/bun.zig (L2987)
(2) beccd01647/src/crash_handler.zig (L198)
There are two layers here. The first is that, on startup, a v8 SnapshotCreator
is created, and a snapshot-specific isolate/context is setup with our browser
environment. This contains most of what was in Env.init and a good chunk of
what was in ExecutionWorld.createContext. From this, we create a v8.StartupData
which is used for the creation of all subsequent contexts. The snapshot sits
at the application level, above the Env - it's re-used for all envs/isolates, so
this gives a nice performance boost for both 1 connection opening multiple pages
or multiple connections opening 1 page.
The second layer is that the Snapshot data can be embedded into the binary, so
that it doesn't have to be created on startup, but rather created at build-time.
This improves the startup time (though, I'm not really sure how to measure that
accurately...).
The first layer is the big win (and just works as-is without any build / usage
changes).
with snapshot
total runs 1000
total duration (ms) 7527
avg run duration (ms) 7
min run duration (ms) 5
max run duration (ms) 41
without snapshot
total runs 1000
total duration (ms) 9350
avg run duration (ms) 9
min run duration (ms) 8
max run duration (ms) 42
To embed a snapshot into the binary, we first need to create the snapshot file:
zig build -Doptimize=ReleaseFast snapshot_creator -- src/snapshot.bin
And then build using the new snapshot_path argument:
zig build -Dsnapshot_path=../../snapshot.bin -Doptimize=ReleaseFast
The paths are weird, I know...since it's embedded, it needs to be inside the
project path, hence we put it in src/snapshot.bin. And since it's embedded
relative to the embedder (src/browser/js/Snapshot.zig) the path has to be
relative to that, hence ../../snapshot.bin. I'm open to suggestions on
improving this.
Adds bortli as a submodules, and compiles the decoder, making it available to
libcurl.
Some websites appear to sent brotli encoded responses even though we don't
advertise support for it (e.g. https://movie.douban.com).
Previously, the IO loop was doing three things:
1 - Managing timeouts (either from scripts or for our own needs)
2 - Handling browser IO events (page/script/xhr)
3 - Handling CDP events (accept, read, write, timeout)
With the libcurl merge, 1 was moved to an in-process scheduler and 2 was moved
to libcurl's own event loop. That means the entire loop code, including
the dependency on tigerbeetle-io existed for handling a single TCP client.
Not only is that a lot of code, there was also friction between the two loops
(the libcurl one and our IO loop), which would result in latency - while one
loop is waiting for the events, any events on the other loop go un-processed.
This PR removes our IO loop. To accomplish this:
1 - The main accept loop is blocking. This is simpler and works perfectly well,
given we only allow 1 active connection.
2 - The client socket is passed to libcurl - yes, libcurl's loop can take
arbitrary FDs and poll them along with its own.
In addition to having one less dependency, the CDP code is quite a bit simpler,
especially around shutdowns and writes. This also removes _some_ of the latency
caused by the friction between page process and CDP processing. Specifically,
when CDP now blocks for input, http page events (script loading, xhr, ...) will
still be processed.
There's still friction. For one, the reverse isn't true: when the page is
waiting for events, CDP events aren't going to be processed. But the page.wait
already have some sensitivity to this (e.g. the page.request_intercepted flag).
Also, when CDP waits, while we will process network events, page timeouts are
still not processed. Because of both these remaining issues, we still need to
jump between the two loops - but being able to block on CDP (even for a short
time) WITHOUT stopping the page's network I/O, should reduce some latency.
