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Predefine Vector Capacity for LogRecord Attributes #1908

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merged 7 commits into from
Jul 3, 2024
Merged

Predefine Vector Capacity for LogRecord Attributes #1908

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89d4532
add preallocated vector
lalitb Jul 3, 2024
8708de1
fix syntax
lalitb Jul 3, 2024
b74a1fd
update benchmark result
lalitb Jul 3, 2024
b9cf382
Merge branch 'main' into otel-preallocate-vec
lalitb Jul 3, 2024
ec5fadd
override default while creating LogRecord
lalitb Jul 3, 2024
adb0b90
revert record
lalitb Jul 3, 2024
27ea8c5
update stress results
lalitb Jul 3, 2024
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2 changes: 1 addition & 1 deletion opentelemetry-appender-tracing/benches/logs.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@
| noop_layer_disabled | 12 ns |
| noop_layer_enabled | 25 ns |
| ot_layer_disabled | 19 ns |
| ot_layer_enabled | 371 ns |
| ot_layer_enabled | 270 ns |
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❤️ this! Could you update stress tests too?

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updated stress. The benchmark shows improvement from 391 ns -> 305 ns. Updated that too.

*/

use async_trait::async_trait;
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7 changes: 6 additions & 1 deletion opentelemetry-sdk/src/logs/log_emitter.rs
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Expand Up @@ -40,6 +40,7 @@ pub struct LoggerProvider {

/// Default logger name if empty string is provided.
const DEFAULT_COMPONENT_NAME: &str = "rust.opentelemetry.io/sdk/logger";
const PREALLOCATED_ATTRIBUTE_CAPACITY: usize = 8;

impl opentelemetry::logs::LoggerProvider for LoggerProvider {
type Logger = Logger;
Expand Down Expand Up @@ -246,7 +247,11 @@ impl opentelemetry::logs::Logger for Logger {
type LogRecord = LogRecord;

fn create_log_record(&self) -> Self::LogRecord {
LogRecord::default()
// Reserve attributes memory for perf optimization. This may change in future.
LogRecord {
attributes: Some(Vec::with_capacity(PREALLOCATED_ATTRIBUTE_CAPACITY)),
..Default::default()
}
}

/// Emit a `LogRecord`.
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