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Refactor PyImport_ImportModuleLevelObject(). #4680

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Merged
nascheme merged 2 commits into from
Dec 3, 2017
Merged

Refactor PyImport_ImportModuleLevelObject(). #4680

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864202a
Refactor PyImport_ImportModuleLevelObject().
nascheme Dec 2, 2017
550e50f
Restore braces around goto statement.
nascheme Dec 3, 2017
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107 changes: 57 additions & 50 deletions Python/import.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1589,12 +1589,67 @@ resolve_name(PyObject *name, PyObject *globals, int level)
return NULL;
}

static PyObject *
import_find_and_load(PyObject *abs_name)
{
_Py_IDENTIFIER(_find_and_load);
PyObject *mod = NULL;
PyInterpreterState *interp = PyThreadState_GET()->interp;
int import_time = interp->core_config.import_time;
static int import_level;
static _PyTime_t accumulated;

_PyTime_t t1 = 0, accumulated_copy = accumulated;

/* XOptions is initialized after first some imports.
* So we can't have negative cache before completed initialization.
* Anyway, importlib._find_and_load is much slower than
* _PyDict_GetItemIdWithError().
*/
if (import_time) {
static int header = 1;
if (header) {
fputs("import time: self [us] | cumulative | imported package\n",
stderr);
header = 0;
}

import_level++;
t1 = _PyTime_GetPerfCounter();
accumulated = 0;
}

if (PyDTrace_IMPORT_FIND_LOAD_START_ENABLED())
PyDTrace_IMPORT_FIND_LOAD_START(PyUnicode_AsUTF8(abs_name));

mod = _PyObject_CallMethodIdObjArgs(interp->importlib,
&PyId__find_and_load, abs_name,
interp->import_func, NULL);

if (PyDTrace_IMPORT_FIND_LOAD_DONE_ENABLED())
PyDTrace_IMPORT_FIND_LOAD_DONE(PyUnicode_AsUTF8(abs_name),
mod != NULL);

if (import_time) {
_PyTime_t cum = _PyTime_GetPerfCounter() - t1;
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@0dminnimda 0dminnimda Jan 30, 2022

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I see .. a cultured individual .. good job 🔥


import_level--;
fprintf(stderr, "import time: %9ld | %10ld | %*s%s\n",
(long)_PyTime_AsMicroseconds(cum - accumulated, _PyTime_ROUND_CEILING),
(long)_PyTime_AsMicroseconds(cum, _PyTime_ROUND_CEILING),
import_level*2, "", PyUnicode_AsUTF8(abs_name));

accumulated = accumulated_copy + cum;
}

return mod;
}

PyObject *
PyImport_ImportModuleLevelObject(PyObject *name, PyObject *globals,
PyObject *locals, PyObject *fromlist,
int level)
{
_Py_IDENTIFIER(_find_and_load);
_Py_IDENTIFIER(_handle_fromlist);
PyObject *abs_name = NULL;
PyObject *final_mod = NULL;
Expand Down Expand Up @@ -1674,55 +1729,7 @@ PyImport_ImportModuleLevelObject(PyObject *name, PyObject *globals,
}
}
else {
int import_time = interp->core_config.import_time;
static int import_level;
static _PyTime_t accumulated;

_PyTime_t t1 = 0, accumulated_copy = accumulated;

/* XOptions is initialized after first some imports.
* So we can't have negative cache before completed initialization.
* Anyway, importlib._find_and_load is much slower than
* _PyDict_GetItemIdWithError().
*/
if (import_time) {
static int header = 1;
if (header) {
fputs("import time: self [us] | cumulative | imported package\n",
stderr);
header = 0;
}

import_level++;
t1 = _PyTime_GetPerfCounter();
accumulated = 0;
}

Py_XDECREF(mod);

if (PyDTrace_IMPORT_FIND_LOAD_START_ENABLED())
PyDTrace_IMPORT_FIND_LOAD_START(PyUnicode_AsUTF8(abs_name));

mod = _PyObject_CallMethodIdObjArgs(interp->importlib,
&PyId__find_and_load, abs_name,
interp->import_func, NULL);

if (PyDTrace_IMPORT_FIND_LOAD_DONE_ENABLED())
PyDTrace_IMPORT_FIND_LOAD_DONE(PyUnicode_AsUTF8(abs_name),
mod != NULL);

if (import_time) {
_PyTime_t cum = _PyTime_GetPerfCounter() - t1;

import_level--;
fprintf(stderr, "import time: %9ld | %10ld | %*s%s\n",
(long)_PyTime_AsMicroseconds(cum - accumulated, _PyTime_ROUND_CEILING),
(long)_PyTime_AsMicroseconds(cum, _PyTime_ROUND_CEILING),
import_level*2, "", PyUnicode_AsUTF8(abs_name));

accumulated = accumulated_copy + cum;
}

mod = import_find_and_load(abs_name);
if (mod == NULL) {
goto error;
}
Expand Down