David Barsky davidbarsky

## backtrace2.txt
(lldb) thread backtrace all
* thread #1, name = 'main', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
  * frame #0: 0x000000018802b62c libsystem_kernel.dylib`__ulock_wait + 8
    frame #1: 0x000000018806c49c libsystem_pthread.dylib`_pthread_join + 608
    frame #2: 0x000000010155ddc4 rust-analyzer`std::sys::pal::unix::thread::Thread::join::hf9819b5e1c4eb05e + 24
    frame #3: 0x000000010040f000 rust-analyzer`std::thread::JoinInner$LT$T$GT$::join::h71706a1aa50149a9 + 32
    frame #4: 0x000000010042259c rust-analyzer`jod_thread::JoinHandle$LT$T$GT$::join::h519d9c89f867ea72 + 56
    frame #5: 0x0000000100426f80 rust-analyzer`rust_analyzer::with_extra_thread::h6e67b23e8c0fcce7 + 244
    frame #6: 0x00000001003ea384 rust-analyzer`rust_analyzer::main::hab46c9de6ebd61c6 + 2660
    frame #7: 0x0000000100459b0c rust-analyzer`std::sys_common::backtrace::__rust_begin_short_backtrace::h331e3c9bcc7965cf + 12

## backtrace.txt
(lldb) thread backtrace all
* thread #1, name = 'main', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
  * frame #0: 0x000000018802b62c libsystem_kernel.dylib`__ulock_wait + 8
    frame #1: 0x000000018806c49c libsystem_pthread.dylib`_pthread_join + 608
    frame #2: 0x000000010155ddc4 rust-analyzer`std::sys::pal::unix::thread::Thread::join::hf9819b5e1c4eb05e + 24
    frame #3: 0x000000010040f000 rust-analyzer`std::thread::JoinInner$LT$T$GT$::join::h71706a1aa50149a9 + 32
    frame #4: 0x000000010042259c rust-analyzer`jod_thread::JoinHandle$LT$T$GT$::join::h519d9c89f867ea72 + 56
    frame #5: 0x0000000100426f80 rust-analyzer`rust_analyzer::with_extra_thread::h6e67b23e8c0fcce7 + 244
    frame #6: 0x00000001003ea384 rust-analyzer`rust_analyzer::main::hab46c9de6ebd61c6 + 2660
    frame #7: 0x0000000100459b0c rust-analyzer`std::sys_common::backtrace::__rust_begin_short_backtrace::h331e3c9bcc7965cf + 12

## full-trace-cached.txt
     574ms handle_completion
        28ms CompletionContext::new
          14ms CompletionContext::analyze
            14ms Semantics::analyze_impl (2 calls)
             0ms SourceBinder::to_module_def (2 calls)
             0ms body_with_source_map_query
               0ms crate_def_map:wait (5 calls)
             0ms crate_def_map:wait (6 calls)
             0ms generic_params_query (2 calls)
            14ms infer:wait @ detail = "new"  (2 calls)

## profile.txt
<details>
    <summary> </summary>

```
    783ms handle_completion
        30ms CompletionContext::new
          13ms CompletionContext::analyze
            13ms Semantics::analyze_impl (2 calls)
            13ms infer:wait @ detail = "new"  (2 calls)
              13ms infer_query

## tokio_spawn_thingy.rs
#![deny(rust_2018_idioms)]
/// This is a example showing how information is scoped with tokio's
/// `task::spawn`.
///
/// You can run this example by running the following command in a terminal
///
/// ```
/// cargo run --example tokio-spawny-thing
/// ```
use futures::stream::{FuturesUnordered, StreamExt};

## Lambda Runtime Todos.md

      
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              April 27, 2020 18:33
            
          
    Items:

Better usage docs/examples. The invocation context is accessible through the INVOCATION_CTX task-local which should be documented in examples and documenation. https://github.com/awslabs/aws-lambda-rust-runtime/blob/master/lambda/src/lib.rs#L95-L97. Note that due to limitations in Tokio's task local implementation, subtasks of the invocation task (which is what we run for customers) can't access this task-local. This is a tempoary limitation.
Use tracing for internal logging/instrumentation. Each interaction with the Runtime APIs should be a debug_span! and spawning a new task should a debug_span!. davidbarky@ should handle this.
Slightly refactor the simulated endpoint logic to be driven by an Rng rather than a hard-coded UUID.

We should add an init_failure simulated endpoint and propogate tasks out.
The path routing logic can be cleaned up a bit more by using recently-stabilized Rust features.


## ec2-benchmarking.txt
tracing/tracing-subscriber on  david/downcast_ref-registry is 📦 v0.1.5 via v1.39.0
❯ cargo bench --bench=fmt
    Finished release [optimized] target(s) in 0.09s
     Running /local/home/dbarsky/Developer/tracing/target/release/deps/fmt-a1a7fd83bd4e2201
Gnuplot not found, disabling plotting
new_span/single_thread/1
                        time:   [542.32 ns 542.57 ns 542.80 ns]
                        thrpt:  [1.8423 Melem/s 1.8431 Melem/s 1.8439 Melem/s]
                 change:
                        time:   [+1.5380% +1.6310% +1.7080%] (p = 0.00 < 0.05)

## Criterion.txt
     Running /Users/dbarsky/Developer/Rust/tracing/target/release/deps/filter-1f05138b0829f7a9
static/baseline_single_threaded
                        time:   [109.35 ns 110.75 ns 112.28 ns]
                        change: [-19.618% -12.070% -3.7712%] (p = 0.01 < 0.05)
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  2 (2.00%) high mild
  2 (2.00%) high severe
static/single_threaded  time:   [59.616 ns 60.292 ns 61.067 ns]
                        change: [-43.963% -36.500% -27.781%] (p = 0.00 < 0.05)

## commit.txt
This branch introduces:

- A registry build atop of https://github.com/hawkw/sharded-slab. Layers
  are expected to consume this registry through the traits `SpanData`,
  `LookupSpan`, and `LookupMetadata`. Layer-specific data, such as
  formatted spans and events, are stored in the `Extensions` typemap. Data
  is writable via the `ExtensionsMut` view struct of the typemap. This
  enables layers to read and write data that they are specifically
  interested in.

## logging-error
ctx: Current { inner: None }
Event: Event { fields: ValueSet { query: Set { key: "somekey", value: "somevalue" }, callsite: Identifier(0x10af28f90) }, metadata: Metadata { name: "event src/main.rs:126", target: "application_repro", level: Level(Trace), module_path: "application_repro", location: src/main.rs:126, fields: {query}, callsite: Identifier(0x10af28f90), kind: Kind(Event) }, parent: Current }
ctx: Current { inner: None }
Event: Event { fields: ValueSet { response: Response { status: 200, version: HTTP/1.1, headers: {}, body: Body(Empty) }, callsite: Identifier(0x10af28f80) }, metadata: Metadata { name: "event src/main.rs:131", target: "application_repro", level: Level(Trace), module_path: "application_repro", location: src/main.rs:131, fields: {response}, callsite: Identifier(0x10af28f80), kind: Kind(Event) }, parent: Current }
Span: Span { name: "Task::run", parent: None, metadata: Metadata { name: "Task::run", target: "tokio_executor::threadpool::task", level: Level(Trace), module_path: "tokio_exec
	(lldb) thread backtrace all
	* thread #1, name = 'main', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
	* frame #0: 0x000000018802b62c libsystem_kernel.dylib`__ulock_wait + 8
	frame #1: 0x000000018806c49c libsystem_pthread.dylib`_pthread_join + 608
	frame #2: 0x000000010155ddc4 rust-analyzer`std::sys::pal::unix::thread::Thread::join::hf9819b5e1c4eb05e + 24
	frame #3: 0x000000010040f000 rust-analyzer`std::thread::JoinInner$LT$T$GT$::join::h71706a1aa50149a9 + 32
	frame #4: 0x000000010042259c rust-analyzer`jod_thread::JoinHandle$LT$T$GT$::join::h519d9c89f867ea72 + 56
	frame #5: 0x0000000100426f80 rust-analyzer`rust_analyzer::with_extra_thread::h6e67b23e8c0fcce7 + 244
	frame #6: 0x00000001003ea384 rust-analyzer`rust_analyzer::main::hab46c9de6ebd61c6 + 2660
	frame #7: 0x0000000100459b0c rust-analyzer`std::sys_common::backtrace::__rust_begin_short_backtrace::h331e3c9bcc7965cf + 12
	574ms handle_completion
	28ms CompletionContext::new
	14ms CompletionContext::analyze
	14ms Semantics::analyze_impl (2 calls)
	0ms SourceBinder::to_module_def (2 calls)
	0ms body_with_source_map_query
	0ms crate_def_map:wait (5 calls)
	0ms crate_def_map:wait (6 calls)
	0ms generic_params_query (2 calls)
	14ms infer:wait @ detail = "new" (2 calls)
	<details>
	<summary> </summary>

	```
	783ms handle_completion
	30ms CompletionContext::new
	13ms CompletionContext::analyze
	13ms Semantics::analyze_impl (2 calls)
	13ms infer:wait @ detail = "new" (2 calls)
	13ms infer_query
	#![deny(rust_2018_idioms)]
	/// This is a example showing how information is scoped with tokio's
	/// `task::spawn`.
	///
	/// You can run this example by running the following command in a terminal
	///
	/// ```
	/// cargo run --example tokio-spawny-thing
	/// ```
	use futures::stream::{FuturesUnordered, StreamExt};
	tracing/tracing-subscriber on  david/downcast_ref-registry is 📦 v0.1.5 via v1.39.0
	❯ cargo bench --bench=fmt
	Finished release [optimized] target(s) in 0.09s
	Running /local/home/dbarsky/Developer/tracing/target/release/deps/fmt-a1a7fd83bd4e2201
	Gnuplot not found, disabling plotting
	new_span/single_thread/1
	time: [542.32 ns 542.57 ns 542.80 ns]
	thrpt: [1.8423 Melem/s 1.8431 Melem/s 1.8439 Melem/s]
	change:
	time: [+1.5380% +1.6310% +1.7080%] (p = 0.00 < 0.05)
	Running /Users/dbarsky/Developer/Rust/tracing/target/release/deps/filter-1f05138b0829f7a9
	static/baseline_single_threaded
	time: [109.35 ns 110.75 ns 112.28 ns]
	change: [-19.618% -12.070% -3.7712%] (p = 0.01 < 0.05)
	Performance has improved.
	Found 4 outliers among 100 measurements (4.00%)
	2 (2.00%) high mild
	2 (2.00%) high severe
	static/single_threaded time: [59.616 ns 60.292 ns 61.067 ns]
	change: [-43.963% -36.500% -27.781%] (p = 0.00 < 0.05)
	This branch introduces:

	- A registry build atop of https://github.com/hawkw/sharded-slab. Layers
	are expected to consume this registry through the traits `SpanData`,
	`LookupSpan`, and `LookupMetadata`. Layer-specific data, such as
	formatted spans and events, are stored in the `Extensions` typemap. Data
	is writable via the `ExtensionsMut` view struct of the typemap. This
	enables layers to read and write data that they are specifically
	interested in.
	ctx: Current { inner: None }
	Event: Event { fields: ValueSet { query: Set { key: "somekey", value: "somevalue" }, callsite: Identifier(0x10af28f90) }, metadata: Metadata { name: "event src/main.rs:126", target: "application_repro", level: Level(Trace), module_path: "application_repro", location: src/main.rs:126, fields: {query}, callsite: Identifier(0x10af28f90), kind: Kind(Event) }, parent: Current }
	ctx: Current { inner: None }
	Event: Event { fields: ValueSet { response: Response { status: 200, version: HTTP/1.1, headers: {}, body: Body(Empty) }, callsite: Identifier(0x10af28f80) }, metadata: Metadata { name: "event src/main.rs:131", target: "application_repro", level: Level(Trace), module_path: "application_repro", location: src/main.rs:131, fields: {response}, callsite: Identifier(0x10af28f80), kind: Kind(Event) }, parent: Current }
	Span: Span { name: "Task::run", parent: None, metadata: Metadata { name: "Task::run", target: "tokio_executor::threadpool::task", level: Level(Trace), module_path: "tokio_exec