Alex Rickabaugh 48fec08c95 perf(compiler-cli): refactor the performance tracing infrastructure (#41125)
ngtsc has an internal performance tracing package, which previously has not
really seen much use. It used to track performance statistics on a very
granular basis (microseconds per actual class analysis, for example). This
had two problems:

* it produced voluminous amounts of data, complicating the analysis of such
  results and providing dubious value.
* it added nontrivial overhead to compilation when used (which also affected
  the very performance of the operations being measured).

This commit replaces the old system with a streamlined performance tracing
setup which is lightweight and designed to be always-on. The new system
tracks 3 metrics:

* time taken by various phases and operations within the compiler
* events (counters) which measure the shape and size of the compilation
* memory usage measured at various points of the compilation process

If the compiler option `tracePerformance` is set, the compiler will
serialize these metrics to a JSON file at that location after compilation is
complete.

PR Close #41125
2021-03-24 13:42:24 -07:00

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Python

package(default_visibility = ["//visibility:public"])
load("//tools:defaults.bzl", "jasmine_node_test", "ts_library")
ts_library(
name = "test_lib",
testonly = True,
srcs = glob([
"**/*.ts",
]),
deps = [
"//packages:types",
"//packages/compiler-cli/src/ngtsc/cycles",
"//packages/compiler-cli/src/ngtsc/file_system",
"//packages/compiler-cli/src/ngtsc/file_system/testing",
"//packages/compiler-cli/src/ngtsc/perf",
"//packages/compiler-cli/src/ngtsc/testing",
"@npm//typescript",
],
)
jasmine_node_test(
name = "test",
bootstrap = ["//tools/testing:node_no_angular_es5"],
deps = [
":test_lib",
],
)