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feature: extend traces to include source scans #7937

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rgrinberg
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Source scans can be quite slow. Record them in the trace.

Signed-off-by: Rudi Grinberg me@rgrinberg.com

@rgrinberg rgrinberg force-pushed the ps/rr/feature__extend_traces_to_include_source_scans branch 3 times, most recently from 0460dd8 to 89d3e36 Compare June 11, 2023 15:12
@rgrinberg rgrinberg requested a review from snowleopard June 11, 2023 15:22
Source scans can be quite slow. Record them in the trace.

Signed-off-by: Rudi Grinberg <me@rgrinberg.com>

<!-- ps-id: 373fb4fc-304f-43c1-9fe2-c67175f3ee40 -->
@rgrinberg rgrinberg force-pushed the ps/rr/feature__extend_traces_to_include_source_scans branch from 89d3e36 to a424074 Compare June 11, 2023 16:44
@rgrinberg rgrinberg merged commit 11386f1 into main Jun 13, 2023
@rgrinberg rgrinberg deleted the ps/rr/feature__extend_traces_to_include_source_scans branch June 13, 2023 18:39
@rgrinberg
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Actually we no longer share the source tree code so there's nothing to review here.

@snowleopard
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Can you show an example trace of some non-trivial build to see how much it takes?

@rgrinberg
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So for doing a null build on dune, dune.exe build @check is around 2.5 seconds. 1.3 seconds of that is scanning the source tree.

@snowleopard
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Oh, wow. I now want some similar tracing internally =)

emillon added a commit to emillon/opam-repository that referenced this pull request Jun 23, 2023
CHANGES:

- Validate file extension for `$ dune ocaml top-module`. (ocaml/dune#8005, fixes ocaml/dune#8004, @3Rafal)

- Include the time it takes to read/write state files when `--trace-file` is
  enabled (ocaml/dune#7960, @rgrinberg)

- Add `dune show` command group which is an alias of `dune describe`. (ocaml/dune#7946,
  @Alizter)

- Include source tree scans in the traces produced by `--trace-file` (ocaml/dune#7937,
  @rgrinberg)

- Cinaps: The promotion rules for cinaps would only offer one file at a time no
  matter how many promotions were available. Now we offer all the promotions at
  once (ocaml/dune#7901, @rgrinberg)

- Do not re-run OCaml syntax files on every iteration of the watch mode. This
  is too memory consuming. (ocaml/dune#7894, fix ocaml/dune#6900, @rgrinberg)

- Remove some compatibility code for old version of dune that generated
  `.merlin` files. Now dune will never remove `.merlin` files automatically
  (ocaml/dune#7562)

- Add `dune show env` command and make `dune printenv` an alias of it. (ocaml/dune#7985,
  @Alizter)

- Add additional metadata to the traces provided by `--trace-file` whenever
  `--trace-extended` is passed (ocaml/dune#7778, @rleshchinskiy)

- Extensions used in `(dialect)` can contain periods (e.g., `cppo.ml`). (ocaml/dune#7782,
  fixes ocaml/dune#7777, @nojb)

- Allow `(include_subdirs qualified)` to be used when libraries define a
  `(modules ...)` field (ocaml/dune#7797, fixes ocaml/dune#7597, @anmonteiro)

- `$ dune describe` is now a command group, so arguments to subcommands must be
  passed after subcommand itself. (ocaml/dune#7919, @Alizter)

- The `interface` and `implementation` fields of a `(dialect)` are now optional
  (ocaml/dune#7757, @gpetiot)

- Add commands `dune show targets` and `dune show aliases` that display all the
  available targets and aliases in a given directory respectively. (ocaml/dune#7770,
  grants ocaml/dune#265, @Alizter)

- Allow multiple globs in library's `(stdlib (internal_modules ..))`
  (@anmonteiro, ocaml/dune#7878)

- Attach melange rules to the default alias (ocaml/dune#7926, @haochenx)

- In opam constraints, reject `(and)` and `(or)` with no arguments at parse
  time (ocaml/dune#7730, @emillon)

- Compute digests and manage sandboxes in background threads (ocaml/dune#7947,
  @rgrinberg)

- Add `(build_if)` to the `(test)` stanza. When it evaluates to false, the
  executable is not built. (ocaml/dune#7899, fixes ocaml/dune#6938, @emillon)

- Add necessary parentheses in generated opam constraints (ocaml/dune#7682, fixes ocaml/dune#3431,
  @Lucccyo)
emillon added a commit to emillon/opam-repository that referenced this pull request Jun 28, 2023
CHANGES:

- Validate file extension for `$ dune ocaml top-module`. (ocaml/dune#8005, fixes ocaml/dune#8004, @3Rafal)

- Include the time it takes to read/write state files when `--trace-file` is
  enabled (ocaml/dune#7960, @rgrinberg)

- Add `dune show` command group which is an alias of `dune describe`. (ocaml/dune#7946,
  @Alizter)

- Include source tree scans in the traces produced by `--trace-file` (ocaml/dune#7937,
  @rgrinberg)

- Cinaps: The promotion rules for cinaps would only offer one file at a time no
  matter how many promotions were available. Now we offer all the promotions at
  once (ocaml/dune#7901, @rgrinberg)

- Do not re-run OCaml syntax files on every iteration of the watch mode. This
  is too memory consuming. (ocaml/dune#7894, fix ocaml/dune#6900, @rgrinberg)

- Add `--all` option to `dune rpc status` to show all Dune RPC servers running.
  (ocaml/dune#8011, fix ocaml/dune#7902, @Alizter)

- Remove some compatibility code for old version of dune that generated
  `.merlin` files. Now dune will never remove `.merlin` files automatically
  (ocaml/dune#7562)

- Add `dune show env` command and make `dune printenv` an alias of it. (ocaml/dune#7985,
  @Alizter)

- Add additional metadata to the traces provided by `--trace-file` whenever
  `--trace-extended` is passed (ocaml/dune#7778, @rleshchinskiy)

- Extensions used in `(dialect)` can contain periods (e.g., `cppo.ml`). (ocaml/dune#7782,
  fixes ocaml/dune#7777, @nojb)

- Allow `(include_subdirs qualified)` to be used when libraries define a
  `(modules ...)` field (ocaml/dune#7797, fixes ocaml/dune#7597, @anmonteiro)

- `$ dune describe` is now a command group, so arguments to subcommands must be
  passed after subcommand itself. (ocaml/dune#7919, @Alizter)

- The `interface` and `implementation` fields of a `(dialect)` are now optional
  (ocaml/dune#7757, @gpetiot)

- Add commands `dune show targets` and `dune show aliases` that display all the
  available targets and aliases in a given directory respectively. (ocaml/dune#7770,
  grants ocaml/dune#265, @Alizter)

- Allow multiple globs in library's `(stdlib (internal_modules ..))`
  (@anmonteiro, ocaml/dune#7878)

- Attach melange rules to the default alias (ocaml/dune#7926, @haochenx)

- In opam constraints, reject `(and)` and `(or)` with no arguments at parse
  time (ocaml/dune#7730, @emillon)

- Compute digests and manage sandboxes in background threads (ocaml/dune#7947,
  @rgrinberg)

- Add `(build_if)` to the `(test)` stanza. When it evaluates to false, the
  executable is not built. (ocaml/dune#7899, fixes ocaml/dune#6938, @emillon)

- Add necessary parentheses in generated opam constraints (ocaml/dune#7682, fixes ocaml/dune#3431,
  @Lucccyo)
@Khady
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Khady commented Jan 12, 2024

What does “source scans” refer to exactly? Is it only about checking timestamp and hashes, or does it also include the creation and/or execution of rules?

@rgrinberg
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A source scan refers to traversing the entire source tree to extract all project and dune files.

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3 participants