I love sage and I think it's the best but I'm having some serious performance issues. Sometimes it takes like up to 15 seconds to compute trivial expressions. Most of the time, after some period of usage or invocation of specific commands (I haven't observed what causes this) the clear command becomes dysfunctional and I attach the logs:
0 [main] python2.7 14516 child_info_fork::abort: address space needed by 'eclucve31.dll' (0x400000) is already occupied
---------------------------------------------
OSError Traceback (most recent call last)
<ipython-input-50-b74f34915750> in <module>()
----> 1 get_ipython().magic(u'clear ')
/opt/sagemath-8.1/local/lib/python2.7/site-packages/IPython/core/interactiveshell.py in magic(self, arg_s)
2156 magic_name, _, magic_arg_s = arg_s.partition(' ')
2157 magic_name = magic_name.lstrip(prefilter.ESC_MAGIC)
-> 2158 return self.run_line_magic(magic_name, magic_arg_s)
2159
2160 #-------------------------------------------------------------------------
/opt/sagemath-8.1/local/lib/python2.7/site-packages/IPython/core/interactiveshell.py in run_line_magic(self, magic_name, line)
2077 kwargs['local_ns'] = sys._getframe(stack_depth).f_locals
2078 with self.builtin_trap:
-> 2079 result = fn(*args,**kwargs)
2080 return result
2081
/opt/sagemath-8.1/local/lib/python2.7/site-packages/IPython/core/alias.py in __call__(self, rest)
185 cmd = '%s %s' % (cmd % tuple(args[:nargs]),' '.join(args[nargs:]))
186
--> 187 self.shell.system(cmd)
188
189 #-----------------------------------------------------------------------------
/opt/sagemath-8.1/local/lib/python2.7/site-packages/IPython/core/interactiveshell.py in system_raw(self, cmd)
2245 try:
2246 # Use env shell instead of default /bin/sh
-> 2247 ec = subprocess.call(cmd, shell=True, executable=executable)
2248 except KeyboardInterrupt:
2249 # intercept control-C; a long traceback is not useful here
/opt/sagemath-8.1/local/lib/python2.7/subprocess.py in call(*popenargs, **kwargs)
166 retcode = call(["ls", "-l"])
167 """
--> 168 return Popen(*popenargs, **kwargs).wait()
169
170
/opt/sagemath-8.1/local/lib/python2.7/subprocess.py in __init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags)
388 p2cread, p2cwrite,
389 c2pread, c2pwrite,
--> 390 errread, errwrite)
391 except Exception:
392 # Preserve original exception in case os.close raises.
/opt/sagemath-8.1/local/lib/python2.7/subprocess.py in _execute_child(self, args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, to_close, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)
915 gc.disable()
916 try:
--> 917 self.pid = os.fork()
918 except:
919 if gc_was_enabled:
OSError: [Errno 11] Resource temporarily unavailable
sage: clear
0 [main] python2.7 20456 child_info_fork::abort: address space needed by 'eclucve31.dll' (0x400000) is already occupied
---------------------------------------------
OSError Traceback (most recent call last)
<ipython-input-51-b74f34915750> in <module>()
----> 1 get_ipython().magic(u'clear ')
/opt/sagemath-8.1/local/lib/python2.7/site-packages/IPython/core/interactiveshell.py in magic(self, arg_s)
2156 magic_name, _, magic_arg_s = arg_s.partition(' ')
2157 magic_name = magic_name.lstrip(prefilter.ESC_MAGIC)
-> 2158 return self.run_line_magic(magic_name, magic_arg_s)
2159
2160 #-------------------------------------------------------------------------
/opt/sagemath-8.1/local/lib/python2.7/site-packages/IPython/core/interactiveshell.py in run_line_magic(self, magic_name, line)
2077 kwargs['local_ns'] = sys._getframe(stack_depth).f_locals
2078 with self.builtin_trap:
-> 2079 result = fn(*args,**kwargs)
2080 return result
2081
/opt/sagemath-8.1/local/lib/python2.7/site-packages/IPython/core/alias.py in __call__(self, rest)
185 cmd = '%s %s' % (cmd % tuple(args[:nargs]),' '.join(args[nargs:]))
186
--> 187 self.shell.system(cmd)
188
189 #-----------------------------------------------------------------------------
/opt/sagemath-8.1/local/lib/python2.7/site-packages/IPython/core/interactiveshell.py in system_raw(self, cmd)
2245 try:
2246 # Use env shell instead of default /bin/sh
-> 2247 ec = subprocess.call(cmd, shell=True, executable=executable)
2248 except KeyboardInterrupt:
2249 # intercept control-C; a long traceback is not useful here
/opt/sagemath-8.1/local/lib/python2.7/subprocess.py in call(*popenargs, **kwargs)
166 retcode = call(["ls", "-l"])
167 """
--> 168 return Popen(*popenargs, **kwargs).wait()
169
170
/opt/sagemath-8.1/local/lib/python2.7/subprocess.py in __init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags)
388 p2cread, p2cwrite,
389 c2pread, c2pwrite,
--> 390 errread, errwrite)
391 except Exception:
392 # Preserve original exception in case os.close raises.
/opt/sagemath-8.1/local/lib/python2.7/subprocess.py in _execute_child(self, args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, to_close, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)
915 gc.disable()
916 try:
--> 917 self.pid = os.fork()
918 except:
919 if gc_was_enabled:
OSError: [Errno 11] Resource temporarily unavailable
