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c4def505cb
Profiling suggested that on Linux sometimes over 10% of CPU time was being spent inside the systemtap probe entry points in the binding layer, even when the process was not actively being traced with the `stap` tool. That's why this commit makes it possible to use the *_ENABLED() macros and bail out early when we're not being traced, reducing the overhead of unused probes to (almost) zero. Said macros were already being generated by `dtrace -h` but were not usable because they rely on external definitions. To remedy that, we now generate the accompanying object files with `dtrace -G`. This commit includes a change to libuv that has been landed upstream in commit joyent/libuv@3c172ea. |
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| http_parser | ||
| mdb_v8 | ||
| npm | ||
| openssl | ||
| uv | ||
| v8 | ||
| zlib | ||