About
As part of Deno's continuous integration and testing pipeline we measure the performance of certain key metrics of the runtime. You can view these benchmarks here.
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Runtime Metrics
In this section we measure various metrics of the following scripts:
- cold_relative_import
- text_decoder
- error_001
- cold_hello
- workers_round_robin
- relative_import
- workers_startup
- hello
Execution time
Log scale. This shows how much time total it takes to run a script. For deno to execute typescript, it must first compile it to JS. A warm startup is when deno has a cached JS output already, so it should be fast because it bypasses the TS compiler. A cold startup is when deno must compile from scratch.
Syscall count
How many total syscalls are performed when executing a given script. Smaller is better.
TypeScript Performance
Type Checking
In both cases, std/examples/chat/server_test.ts is cached by Deno. The workload contains 20 unique TypeScript modules. With check a full TypeScript type check is performed, while no_check uses the --no-check flag to skip a full type check. bundle does a full type check and generates a single file output, while bundle_no_check uses the --no-check flag to skip a full type check.
I/O
Show normalized benchmarks
HTTP Server Throughput
Tests HTTP server performance. 10 keep-alive connections do as many hello-world requests as possible. Bigger is better.
- deno_tcp is a fake http server that doesn't parse HTTP. It is comparable to node_tcp
- deno_http is a web server written in TypeScript. It is comparable to node_http
- core_http_bin_ops and core_http_json_ops are two versions of a minimal fake HTTP server. It blindly reads and writes fixed HTTP packets. It is comparable to deno_tcp and node_tcp. This is a standalone executable that uses the deno rust crate. The code is in http_bench_json_ops.rs and http_bench_json_ops.js for http_bench_json_ops.
- hyper is a Rust HTTP server and represents an upper bound.
HTTP Latency
Max latency during the same test used above for requests/second. Smaller is better.
Size
Cargo Dependencies
Language Server
We track the performance of the Deno language server under different scenarios to help gauge the overall performance of the language server.
